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Finding the Fourth Proportional to 8,979.74, 12,392.01 and 5,000.90

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Solution

The fourth proportional to 8,979.74, 12,392.01 and 5,000.90 is: 6,901.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979.74 : 12,392.01 = 5,000.90 : x
  2. Step 2: Convert to fraction form
    8,979.74/12,392.01 = 5,000.90/x
  3. Step 3: Cross multiply
    8,979.74x = 12,392.01 × 5,000.90
  4. Step 4: Simplify right side
    8,979.74x = 61,971,202.81
  5. Step 5: Solve for x
    x = 61,971,202.81/8,979.74
  6. Step 6: Final answer
    x = 6,901.22

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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.