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Finding the Fourth Proportional to 8,659.38, 12,989.41 and 4,959.93

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Solution

The fourth proportional to 8,659.38, 12,989.41 and 4,959.93 is: 7,440.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,659.38 : 12,989.41 = 4,959.93 : x
  2. Step 2: Convert to fraction form
    8,659.38/12,989.41 = 4,959.93/x
  3. Step 3: Cross multiply
    8,659.38x = 12,989.41 × 4,959.93
  4. Step 4: Simplify right side
    8,659.38x = 64,426,628.55
  5. Step 5: Solve for x
    x = 64,426,628.55/8,659.38
  6. Step 6: Final answer
    x = 7,440.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.