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Finding the Fourth Proportional to 34,215.70, 47,211.90 and 19,107.80

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Solution

The fourth proportional to 34,215.70, 47,211.90 and 19,107.80 is: 26,365.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,215.70 : 47,211.90 = 19,107.80 : x
  2. Step 2: Convert to fraction form
    34,215.70/47,211.90 = 19,107.80/x
  3. Step 3: Cross multiply
    34,215.70x = 47,211.90 × 19,107.80
  4. Step 4: Simplify right side
    34,215.70x = 902,115,542.82
  5. Step 5: Solve for x
    x = 902,115,542.82/34,215.70
  6. Step 6: Final answer
    x = 26,365.55

Related Problems

Find fourth proportional to 17,107.85, 23,605.95 and 9,553.90
Half scale
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Double scale
Find fourth proportional to 34,216.70, 47,213.28 and 19,108.80
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.