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Finding the Fourth Proportional to 8,662.28, 12,904.80 and 8,244.32

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Solution

The fourth proportional to 8,662.28, 12,904.80 and 8,244.32 is: 12,282.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,662.28 : 12,904.80 = 8,244.32 : x
  2. Step 2: Convert to fraction form
    8,662.28/12,904.80 = 8,244.32/x
  3. Step 3: Cross multiply
    8,662.28x = 12,904.80 × 8,244.32
  4. Step 4: Simplify right side
    8,662.28x = 106,391,300.74
  5. Step 5: Solve for x
    x = 106,391,300.74/8,662.28
  6. Step 6: Final answer
    x = 12,282.14

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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.