Home / 31,402.40-47,089.20-13,863.20

Finding the Fourth Proportional to 31,402.40, 47,089.20 and 13,863.20

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Solution

The fourth proportional to 31,402.40, 47,089.20 and 13,863.20 is: 20,788.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,402.40 : 47,089.20 = 13,863.20 : x
  2. Step 2: Convert to fraction form
    31,402.40/47,089.20 = 13,863.20/x
  3. Step 3: Cross multiply
    31,402.40x = 47,089.20 × 13,863.20
  4. Step 4: Simplify right side
    31,402.40x = 652,806,997.44
  5. Step 5: Solve for x
    x = 652,806,997.44/31,402.40
  6. Step 6: Final answer
    x = 20,788.44

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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.