Home / 15,500.38-21,390.48-8,426.74

Finding the Fourth Proportional to 15,500.38, 21,390.48 and 8,426.74

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Solution

The fourth proportional to 15,500.38, 21,390.48 and 8,426.74 is: 11,628.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,500.38 : 21,390.48 = 8,426.74 : x
  2. Step 2: Convert to fraction form
    15,500.38/21,390.48 = 8,426.74/x
  3. Step 3: Cross multiply
    15,500.38x = 21,390.48 × 8,426.74
  4. Step 4: Simplify right side
    15,500.38x = 180,252,013.44
  5. Step 5: Solve for x
    x = 180,252,013.44/15,500.38
  6. Step 6: Final answer
    x = 11,628.88

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Half scale
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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.