Home / 15,110.91-20,855.52-8,398.71

Finding the Fourth Proportional to 15,110.91, 20,855.52 and 8,398.71

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Solution

The fourth proportional to 15,110.91, 20,855.52 and 8,398.71 is: 11,591.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,110.91 : 20,855.52 = 8,398.71 : x
  2. Step 2: Convert to fraction form
    15,110.91/20,855.52 = 8,398.71/x
  3. Step 3: Cross multiply
    15,110.91x = 20,855.52 × 8,398.71
  4. Step 4: Simplify right side
    15,110.91x = 175,159,464.38
  5. Step 5: Solve for x
    x = 175,159,464.38/15,110.91
  6. Step 6: Final answer
    x = 11,591.59

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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.