Home / 31,387.47-47,077.11-13,853.22

Finding the Fourth Proportional to 31,387.47, 47,077.11 and 13,853.22

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Solution

The fourth proportional to 31,387.47, 47,077.11 and 13,853.22 is: 20,778.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,387.47 : 47,077.11 = 13,853.22 : x
  2. Step 2: Convert to fraction form
    31,387.47/47,077.11 = 13,853.22/x
  3. Step 3: Cross multiply
    31,387.47x = 47,077.11 × 13,853.22
  4. Step 4: Simplify right side
    31,387.47x = 652,169,561.79
  5. Step 5: Solve for x
    x = 652,169,561.79/31,387.47
  6. Step 6: Final answer
    x = 20,778.02

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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.