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Finding the Fourth Proportional to 8,674.72, 11,972.88 and 5,881.12

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Solution

The fourth proportional to 8,674.72, 11,972.88 and 5,881.12 is: 8,117.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,674.72 : 11,972.88 = 5,881.12 : x
  2. Step 2: Convert to fraction form
    8,674.72/11,972.88 = 5,881.12/x
  3. Step 3: Cross multiply
    8,674.72x = 11,972.88 × 5,881.12
  4. Step 4: Simplify right side
    8,674.72x = 70,413,944.03
  5. Step 5: Solve for x
    x = 70,413,944.03/8,674.72
  6. Step 6: Final answer
    x = 8,117.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.