Home / 28,147.12-38,841.42-15,571

Finding the Fourth Proportional to 28,147.12, 38,841.42 and 15,571

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Solution

The fourth proportional to 28,147.12, 38,841.42 and 15,571 is: 21,487.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,147.12 : 38,841.42 = 15,571 : x
  2. Step 2: Convert to fraction form
    28,147.12/38,841.42 = 15,571/x
  3. Step 3: Cross multiply
    28,147.12x = 38,841.42 × 15,571
  4. Step 4: Simplify right side
    28,147.12x = 604,799,750.82
  5. Step 5: Solve for x
    x = 604,799,750.82/28,147.12
  6. Step 6: Final answer
    x = 21,487.09

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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.