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Finding the Fourth Proportional to 39,991.62, 59,988.42 and 10,410.78

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Solution

The fourth proportional to 39,991.62, 59,988.42 and 10,410.78 is: 15,616.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,991.62 : 59,988.42 = 10,410.78 : x
  2. Step 2: Convert to fraction form
    39,991.62/59,988.42 = 10,410.78/x
  3. Step 3: Cross multiply
    39,991.62x = 59,988.42 × 10,410.78
  4. Step 4: Simplify right side
    39,991.62x = 624,526,243.17
  5. Step 5: Solve for x
    x = 624,526,243.17/39,991.62
  6. Step 6: Final answer
    x = 15,616.43

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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.