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Finding the Fourth Proportional to 12,492.48, 18,726.48 and 5,913.12

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Solution

The fourth proportional to 12,492.48, 18,726.48 and 5,913.12 is: 8,863.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,492.48 : 18,726.48 = 5,913.12 : x
  2. Step 2: Convert to fraction form
    12,492.48/18,726.48 = 5,913.12/x
  3. Step 3: Cross multiply
    12,492.48x = 18,726.48 × 5,913.12
  4. Step 4: Simplify right side
    12,492.48x = 110,731,923.42
  5. Step 5: Solve for x
    x = 110,731,923.42/12,492.48
  6. Step 6: Final answer
    x = 8,863.89

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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.