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Finding the Fourth Proportional to 8,639.02, 12,951.06 and 7,331.32

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Solution

The fourth proportional to 8,639.02, 12,951.06 and 7,331.32 is: 10,990.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.02 : 12,951.06 = 7,331.32 : x
  2. Step 2: Convert to fraction form
    8,639.02/12,951.06 = 7,331.32/x
  3. Step 3: Cross multiply
    8,639.02x = 12,951.06 × 7,331.32
  4. Step 4: Simplify right side
    8,639.02x = 94,948,365.20
  5. Step 5: Solve for x
    x = 94,948,365.20/8,639.02
  6. Step 6: Final answer
    x = 10,990.64

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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.