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Finding the Fourth Proportional to 20,326.65, 30,492.84 and 6,287.91

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Solution

The fourth proportional to 20,326.65, 30,492.84 and 6,287.91 is: 9,432.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,326.65 : 30,492.84 = 6,287.91 : x
  2. Step 2: Convert to fraction form
    20,326.65/30,492.84 = 6,287.91/x
  3. Step 3: Cross multiply
    20,326.65x = 30,492.84 × 6,287.91
  4. Step 4: Simplify right side
    20,326.65x = 191,736,233.56
  5. Step 5: Solve for x
    x = 191,736,233.56/20,326.65
  6. Step 6: Final answer
    x = 9,432.75

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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.