Home / 12,387.92-18,585.36-5,275.76

Finding the Fourth Proportional to 12,387.92, 18,585.36 and 5,275.76

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Solution

The fourth proportional to 12,387.92, 18,585.36 and 5,275.76 is: 7,915.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,387.92 : 18,585.36 = 5,275.76 : x
  2. Step 2: Convert to fraction form
    12,387.92/18,585.36 = 5,275.76/x
  3. Step 3: Cross multiply
    12,387.92x = 18,585.36 × 5,275.76
  4. Step 4: Simplify right side
    12,387.92x = 98,051,898.87
  5. Step 5: Solve for x
    x = 98,051,898.87/12,387.92
  6. Step 6: Final answer
    x = 7,915.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.