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Finding the Fourth Proportional to 8,966.76, 12,372.91 and 4,987.36

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Solution

The fourth proportional to 8,966.76, 12,372.91 and 4,987.36 is: 6,881.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,966.76 : 12,372.91 = 4,987.36 : x
  2. Step 2: Convert to fraction form
    8,966.76/12,372.91 = 4,987.36/x
  3. Step 3: Cross multiply
    8,966.76x = 12,372.91 × 4,987.36
  4. Step 4: Simplify right side
    8,966.76x = 61,708,156.42
  5. Step 5: Solve for x
    x = 61,708,156.42/8,966.76
  6. Step 6: Final answer
    x = 6,881.88

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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.