Home / 16,890.80-25,343.40-8,121.20

Finding the Fourth Proportional to 16,890.80, 25,343.40 and 8,121.20

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Solution

The fourth proportional to 16,890.80, 25,343.40 and 8,121.20 is: 12,185.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,890.80 : 25,343.40 = 8,121.20 : x
  2. Step 2: Convert to fraction form
    16,890.80/25,343.40 = 8,121.20/x
  3. Step 3: Cross multiply
    16,890.80x = 25,343.40 × 8,121.20
  4. Step 4: Simplify right side
    16,890.80x = 205,818,820.08
  5. Step 5: Solve for x
    x = 205,818,820.08/16,890.80
  6. Step 6: Final answer
    x = 12,185.26

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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.