Home / 28,380.10-42,570.16-11,721.83

Finding the Fourth Proportional to 28,380.10, 42,570.16 and 11,721.83

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Solution

The fourth proportional to 28,380.10, 42,570.16 and 11,721.83 is: 17,582.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,380.10 : 42,570.16 = 11,721.83 : x
  2. Step 2: Convert to fraction form
    28,380.10/42,570.16 = 11,721.83/x
  3. Step 3: Cross multiply
    28,380.10x = 42,570.16 × 11,721.83
  4. Step 4: Simplify right side
    28,380.10x = 499,000,070.48
  5. Step 5: Solve for x
    x = 499,000,070.48/28,380.10
  6. Step 6: Final answer
    x = 17,582.74

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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.