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Finding the Fourth Proportional to 27,128.92, 40,695.92 and 8,409.12

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Solution

The fourth proportional to 27,128.92, 40,695.92 and 8,409.12 is: 12,614.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,128.92 : 40,695.92 = 8,409.12 : x
  2. Step 2: Convert to fraction form
    27,128.92/40,695.92 = 8,409.12/x
  3. Step 3: Cross multiply
    27,128.92x = 40,695.92 × 8,409.12
  4. Step 4: Simplify right side
    27,128.92x = 342,216,874.79
  5. Step 5: Solve for x
    x = 342,216,874.79/27,128.92
  6. Step 6: Final answer
    x = 12,614.47

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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.