Home / 39,871.72-59,812.80-13,569.40

Finding the Fourth Proportional to 39,871.72, 59,812.80 and 13,569.40

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Solution

The fourth proportional to 39,871.72, 59,812.80 and 13,569.40 is: 20,355.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,871.72 : 59,812.80 = 13,569.40 : x
  2. Step 2: Convert to fraction form
    39,871.72/59,812.80 = 13,569.40/x
  3. Step 3: Cross multiply
    39,871.72x = 59,812.80 × 13,569.40
  4. Step 4: Simplify right side
    39,871.72x = 811,623,808.32
  5. Step 5: Solve for x
    x = 811,623,808.32/39,871.72
  6. Step 6: Final answer
    x = 20,355.88

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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.