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Finding the Fourth Proportional to 12,479.34, 18,724.53 and 9,701.88

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Solution

The fourth proportional to 12,479.34, 18,724.53 and 9,701.88 is: 14,557.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479.34 : 18,724.53 = 9,701.88 : x
  2. Step 2: Convert to fraction form
    12,479.34/18,724.53 = 9,701.88/x
  3. Step 3: Cross multiply
    12,479.34x = 18,724.53 × 9,701.88
  4. Step 4: Simplify right side
    12,479.34x = 181,663,143.12
  5. Step 5: Solve for x
    x = 181,663,143.12/12,479.34
  6. Step 6: Final answer
    x = 14,557.11

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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.