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Finding the Fourth Proportional to 8,881.92, 12,242.88 and 5,731.20

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Solution

The fourth proportional to 8,881.92, 12,242.88 and 5,731.20 is: 7,899.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,881.92 : 12,242.88 = 5,731.20 : x
  2. Step 2: Convert to fraction form
    8,881.92/12,242.88 = 5,731.20/x
  3. Step 3: Cross multiply
    8,881.92x = 12,242.88 × 5,731.20
  4. Step 4: Simplify right side
    8,881.92x = 70,166,393.86
  5. Step 5: Solve for x
    x = 70,166,393.86/8,881.92
  6. Step 6: Final answer
    x = 7,899.91

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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.