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Finding the Fourth Proportional to 8,913.70, 13,431.83 and 7,387.96

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Solution

The fourth proportional to 8,913.70, 13,431.83 and 7,387.96 is: 11,132.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,913.70 : 13,431.83 = 7,387.96 : x
  2. Step 2: Convert to fraction form
    8,913.70/13,431.83 = 7,387.96/x
  3. Step 3: Cross multiply
    8,913.70x = 13,431.83 × 7,387.96
  4. Step 4: Simplify right side
    8,913.70x = 99,233,777.43
  5. Step 5: Solve for x
    x = 99,233,777.43/8,913.70
  6. Step 6: Final answer
    x = 11,132.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.