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Finding the Fourth Proportional to 8,760.79, 12,089.40 and 4,983.43

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Solution

The fourth proportional to 8,760.79, 12,089.40 and 4,983.43 is: 6,876.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,760.79 : 12,089.40 = 4,983.43 : x
  2. Step 2: Convert to fraction form
    8,760.79/12,089.40 = 4,983.43/x
  3. Step 3: Cross multiply
    8,760.79x = 12,089.40 × 4,983.43
  4. Step 4: Simplify right side
    8,760.79x = 60,246,678.64
  5. Step 5: Solve for x
    x = 60,246,678.64/8,760.79
  6. Step 6: Final answer
    x = 6,876.85

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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.