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Finding the Fourth Proportional to 8,660.28, 12,901.83 and 8,242.32

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Solution

The fourth proportional to 8,660.28, 12,901.83 and 8,242.32 is: 12,279.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,660.28 : 12,901.83 = 8,242.32 : x
  2. Step 2: Convert to fraction form
    8,660.28/12,901.83 = 8,242.32/x
  3. Step 3: Cross multiply
    8,660.28x = 12,901.83 × 8,242.32
  4. Step 4: Simplify right side
    8,660.28x = 106,341,011.45
  5. Step 5: Solve for x
    x = 106,341,011.45/8,660.28
  6. Step 6: Final answer
    x = 12,279.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.