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Finding the Fourth Proportional to 39,998.97, 59,978.29 and 13,335.50

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Solution

The fourth proportional to 39,998.97, 59,978.29 and 13,335.50 is: 19,996.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,998.97 : 59,978.29 = 13,335.50 : x
  2. Step 2: Convert to fraction form
    39,998.97/59,978.29 = 13,335.50/x
  3. Step 3: Cross multiply
    39,998.97x = 59,978.29 × 13,335.50
  4. Step 4: Simplify right side
    39,998.97x = 799,840,153.06
  5. Step 5: Solve for x
    x = 799,840,153.06/39,998.97
  6. Step 6: Final answer
    x = 19,996.52

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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.