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Finding the Fourth Proportional to 8,737.28, 12,069.28 and 6,981.20

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Solution

The fourth proportional to 8,737.28, 12,069.28 and 6,981.20 is: 9,643.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,737.28 : 12,069.28 = 6,981.20 : x
  2. Step 2: Convert to fraction form
    8,737.28/12,069.28 = 6,981.20/x
  3. Step 3: Cross multiply
    8,737.28x = 12,069.28 × 6,981.20
  4. Step 4: Simplify right side
    8,737.28x = 84,258,057.54
  5. Step 5: Solve for x
    x = 84,258,057.54/8,737.28
  6. Step 6: Final answer
    x = 9,643.51

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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.