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Finding the Fourth Proportional to 8,920.89, 13,372.22 and 5,807.15

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Solution

The fourth proportional to 8,920.89, 13,372.22 and 5,807.15 is: 8,704.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.89 : 13,372.22 = 5,807.15 : x
  2. Step 2: Convert to fraction form
    8,920.89/13,372.22 = 5,807.15/x
  3. Step 3: Cross multiply
    8,920.89x = 13,372.22 × 5,807.15
  4. Step 4: Simplify right side
    8,920.89x = 77,654,485.18
  5. Step 5: Solve for x
    x = 77,654,485.18/8,920.89
  6. Step 6: Final answer
    x = 8,704.79

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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.