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Finding the Fourth Proportional to 16,990.65, 25,475.90 and 5,140.83

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Solution

The fourth proportional to 16,990.65, 25,475.90 and 5,140.83 is: 7,708.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,990.65 : 25,475.90 = 5,140.83 : x
  2. Step 2: Convert to fraction form
    16,990.65/25,475.90 = 5,140.83/x
  3. Step 3: Cross multiply
    16,990.65x = 25,475.90 × 5,140.83
  4. Step 4: Simplify right side
    16,990.65x = 130,967,283.85
  5. Step 5: Solve for x
    x = 130,967,283.85/16,990.65
  6. Step 6: Final answer
    x = 7,708.20

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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.