Home / 28,165.50-42,220.28-15,691.22

Finding the Fourth Proportional to 28,165.50, 42,220.28 and 15,691.22

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Solution

The fourth proportional to 28,165.50, 42,220.28 and 15,691.22 is: 23,521.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,165.50 : 42,220.28 = 15,691.22 : x
  2. Step 2: Convert to fraction form
    28,165.50/42,220.28 = 15,691.22/x
  3. Step 3: Cross multiply
    28,165.50x = 42,220.28 × 15,691.22
  4. Step 4: Simplify right side
    28,165.50x = 662,487,701.94
  5. Step 5: Solve for x
    x = 662,487,701.94/28,165.50
  6. Step 6: Final answer
    x = 23,521.25

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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.