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Finding the Fourth Proportional to 8,561.28, 12,831.12 and 7,294.08

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Solution

The fourth proportional to 8,561.28, 12,831.12 and 7,294.08 is: 10,931.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,561.28 : 12,831.12 = 7,294.08 : x
  2. Step 2: Convert to fraction form
    8,561.28/12,831.12 = 7,294.08/x
  3. Step 3: Cross multiply
    8,561.28x = 12,831.12 × 7,294.08
  4. Step 4: Simplify right side
    8,561.28x = 93,591,215.77
  5. Step 5: Solve for x
    x = 93,591,215.77/8,561.28
  6. Step 6: Final answer
    x = 10,931.92

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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.