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Finding the Fourth Proportional to 14,042.70, 21,064.06 and 5,720.49

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Solution

The fourth proportional to 14,042.70, 21,064.06 and 5,720.49 is: 8,580.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,042.70 : 21,064.06 = 5,720.49 : x
  2. Step 2: Convert to fraction form
    14,042.70/21,064.06 = 5,720.49/x
  3. Step 3: Cross multiply
    14,042.70x = 21,064.06 × 5,720.49
  4. Step 4: Simplify right side
    14,042.70x = 120,496,634.72
  5. Step 5: Solve for x
    x = 120,496,634.72/14,042.70
  6. Step 6: Final answer
    x = 8,580.73

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Double scale
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Similar ratio
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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.