Home / 20,818.80-28,731.02-12,325.82

Finding the Fourth Proportional to 20,818.80, 28,731.02 and 12,325.82

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Solution

The fourth proportional to 20,818.80, 28,731.02 and 12,325.82 is: 17,010.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.80 : 28,731.02 = 12,325.82 : x
  2. Step 2: Convert to fraction form
    20,818.80/28,731.02 = 12,325.82/x
  3. Step 3: Cross multiply
    20,818.80x = 28,731.02 × 12,325.82
  4. Step 4: Simplify right side
    20,818.80x = 354,133,175.65
  5. Step 5: Solve for x
    x = 354,133,175.65/20,818.80
  6. Step 6: Final answer
    x = 17,010.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.