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Finding the Fourth Proportional to 8,713, 12,025.56 and 4,987

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Solution

The fourth proportional to 8,713, 12,025.56 and 4,987 is: 6,882.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,713 : 12,025.56 = 4,987 : x
  2. Step 2: Convert to fraction form
    8,713/12,025.56 = 4,987/x
  3. Step 3: Cross multiply
    8,713x = 12,025.56 × 4,987
  4. Step 4: Simplify right side
    8,713x = 59,971,467.72
  5. Step 5: Solve for x
    x = 59,971,467.72/8,713
  6. Step 6: Final answer
    x = 6,882.99

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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.