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Finding the Fourth Proportional to 16,818.76, 25,230.84 and 5,131

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Solution

The fourth proportional to 16,818.76, 25,230.84 and 5,131 is: 7,697.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,818.76 : 25,230.84 = 5,131 : x
  2. Step 2: Convert to fraction form
    16,818.76/25,230.84 = 5,131/x
  3. Step 3: Cross multiply
    16,818.76x = 25,230.84 × 5,131
  4. Step 4: Simplify right side
    16,818.76x = 129,459,440.04
  5. Step 5: Solve for x
    x = 129,459,440.04/16,818.76
  6. Step 6: Final answer
    x = 7,697.32

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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.