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Finding the Fourth Proportional to 8,722.28, 12,036.74 and 4,743.39

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Solution

The fourth proportional to 8,722.28, 12,036.74 and 4,743.39 is: 6,545.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,722.28 : 12,036.74 = 4,743.39 : x
  2. Step 2: Convert to fraction form
    8,722.28/12,036.74 = 4,743.39/x
  3. Step 3: Cross multiply
    8,722.28x = 12,036.74 × 4,743.39
  4. Step 4: Simplify right side
    8,722.28x = 57,094,973.57
  5. Step 5: Solve for x
    x = 57,094,973.57/8,722.28
  6. Step 6: Final answer
    x = 6,545.88

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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.