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Finding the Fourth Proportional to 39,871.56, 59,807.28 and 12,169.56

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Solution

The fourth proportional to 39,871.56, 59,807.28 and 12,169.56 is: 18,254.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,871.56 : 59,807.28 = 12,169.56 : x
  2. Step 2: Convert to fraction form
    39,871.56/59,807.28 = 12,169.56/x
  3. Step 3: Cross multiply
    39,871.56x = 59,807.28 × 12,169.56
  4. Step 4: Simplify right side
    39,871.56x = 727,828,282.40
  5. Step 5: Solve for x
    x = 727,828,282.40/39,871.56
  6. Step 6: Final answer
    x = 18,254.32

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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.