Home / 28,115.91-42,181.16-13,324.50

Finding the Fourth Proportional to 28,115.91, 42,181.16 and 13,324.50

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Solution

The fourth proportional to 28,115.91, 42,181.16 and 13,324.50 is: 19,990.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,115.91 : 42,181.16 = 13,324.50 : x
  2. Step 2: Convert to fraction form
    28,115.91/42,181.16 = 13,324.50/x
  3. Step 3: Cross multiply
    28,115.91x = 42,181.16 × 13,324.50
  4. Step 4: Simplify right side
    28,115.91x = 562,042,799.80
  5. Step 5: Solve for x
    x = 562,042,799.80/28,115.91
  6. Step 6: Final answer
    x = 19,990.20

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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.