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Finding the Fourth Proportional to 8,807.12, 13,191.30 and 8,321.87

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Solution

The fourth proportional to 8,807.12, 13,191.30 and 8,321.87 is: 12,464.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,807.12 : 13,191.30 = 8,321.87 : x
  2. Step 2: Convert to fraction form
    8,807.12/13,191.30 = 8,321.87/x
  3. Step 3: Cross multiply
    8,807.12x = 13,191.30 × 8,321.87
  4. Step 4: Simplify right side
    8,807.12x = 109,776,283.73
  5. Step 5: Solve for x
    x = 109,776,283.73/8,807.12
  6. Step 6: Final answer
    x = 12,464.49

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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.