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Finding the Fourth Proportional to 8,718.68, 12,031.80 and 4,739.79

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Solution

The fourth proportional to 8,718.68, 12,031.80 and 4,739.79 is: 6,540.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718.68 : 12,031.80 = 4,739.79 : x
  2. Step 2: Convert to fraction form
    8,718.68/12,031.80 = 4,739.79/x
  3. Step 3: Cross multiply
    8,718.68x = 12,031.80 × 4,739.79
  4. Step 4: Simplify right side
    8,718.68x = 57,028,205.32
  5. Step 5: Solve for x
    x = 57,028,205.32/8,718.68
  6. Step 6: Final answer
    x = 6,540.92

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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.