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Finding the Fourth Proportional to 10,479.68, 15,722.16 and 3,906.08

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Solution

The fourth proportional to 10,479.68, 15,722.16 and 3,906.08 is: 5,860.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,479.68 : 15,722.16 = 3,906.08 : x
  2. Step 2: Convert to fraction form
    10,479.68/15,722.16 = 3,906.08/x
  3. Step 3: Cross multiply
    10,479.68x = 15,722.16 × 3,906.08
  4. Step 4: Simplify right side
    10,479.68x = 61,412,014.73
  5. Step 5: Solve for x
    x = 61,412,014.73/10,479.68
  6. Step 6: Final answer
    x = 5,860.10

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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.