Home / 15,139.61-20,889.38-9,171.53

Finding the Fourth Proportional to 15,139.61, 20,889.38 and 9,171.53

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Solution

The fourth proportional to 15,139.61, 20,889.38 and 9,171.53 is: 12,654.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,139.61 : 20,889.38 = 9,171.53 : x
  2. Step 2: Convert to fraction form
    15,139.61/20,889.38 = 9,171.53/x
  3. Step 3: Cross multiply
    15,139.61x = 20,889.38 × 9,171.53
  4. Step 4: Simplify right side
    15,139.61x = 191,587,425.05
  5. Step 5: Solve for x
    x = 191,587,425.05/15,139.61
  6. Step 6: Final answer
    x = 12,654.72

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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.