Home / 15,502.38-21,393.18-8,428.75

Finding the Fourth Proportional to 15,502.38, 21,393.18 and 8,428.75

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Solution

The fourth proportional to 15,502.38, 21,393.18 and 8,428.75 is: 11,631.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,502.38 : 21,393.18 = 8,428.75 : x
  2. Step 2: Convert to fraction form
    15,502.38/21,393.18 = 8,428.75/x
  3. Step 3: Cross multiply
    15,502.38x = 21,393.18 × 8,428.75
  4. Step 4: Simplify right side
    15,502.38x = 180,317,765.93
  5. Step 5: Solve for x
    x = 180,317,765.93/15,502.38
  6. Step 6: Final answer
    x = 11,631.62

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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.