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Finding the Fourth Proportional to 52,425.40, 78,647.70 and 21,263.80

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Solution

The fourth proportional to 52,425.40, 78,647.70 and 21,263.80 is: 31,899.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,425.40 : 78,647.70 = 21,263.80 : x
  2. Step 2: Convert to fraction form
    52,425.40/78,647.70 = 21,263.80/x
  3. Step 3: Cross multiply
    52,425.40x = 78,647.70 × 21,263.80
  4. Step 4: Simplify right side
    52,425.40x = 1,672,348,963.26
  5. Step 5: Solve for x
    x = 1,672,348,963.26/52,425.40
  6. Step 6: Final answer
    x = 31,899.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.