Home / 28,217.20-38,937.88-15,641.20

Finding the Fourth Proportional to 28,217.20, 38,937.88 and 15,641.20

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Solution

The fourth proportional to 28,217.20, 38,937.88 and 15,641.20 is: 21,583.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,217.20 : 38,937.88 = 15,641.20 : x
  2. Step 2: Convert to fraction form
    28,217.20/38,937.88 = 15,641.20/x
  3. Step 3: Cross multiply
    28,217.20x = 38,937.88 × 15,641.20
  4. Step 4: Simplify right side
    28,217.20x = 609,035,168.66
  5. Step 5: Solve for x
    x = 609,035,168.66/28,217.20
  6. Step 6: Final answer
    x = 21,583.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.