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Finding the Fourth Proportional to 39,988.71, 59,917.41 and 13,679.10

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Solution

The fourth proportional to 39,988.71, 59,917.41 and 13,679.10 is: 20,496.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,988.71 : 59,917.41 = 13,679.10 : x
  2. Step 2: Convert to fraction form
    39,988.71/59,917.41 = 13,679.10/x
  3. Step 3: Cross multiply
    39,988.71x = 59,917.41 × 13,679.10
  4. Step 4: Simplify right side
    39,988.71x = 819,616,243.13
  5. Step 5: Solve for x
    x = 819,616,243.13/39,988.71
  6. Step 6: Final answer
    x = 20,496.19

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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.