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Finding the Fourth Proportional to 15,948.40, 23,879.40 and 12,492.40

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Solution

The fourth proportional to 15,948.40, 23,879.40 and 12,492.40 is: 18,704.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,948.40 : 23,879.40 = 12,492.40 : x
  2. Step 2: Convert to fraction form
    15,948.40/23,879.40 = 12,492.40/x
  3. Step 3: Cross multiply
    15,948.40x = 23,879.40 × 12,492.40
  4. Step 4: Simplify right side
    15,948.40x = 298,311,016.56
  5. Step 5: Solve for x
    x = 298,311,016.56/15,948.40
  6. Step 6: Final answer
    x = 18,704.76

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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.