Home / 22,990.82-31,715.42-15,439.29

Finding the Fourth Proportional to 22,990.82, 31,715.42 and 15,439.29

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Solution

The fourth proportional to 22,990.82, 31,715.42 and 15,439.29 is: 21,298.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,990.82 : 31,715.42 = 15,439.29 : x
  2. Step 2: Convert to fraction form
    22,990.82/31,715.42 = 15,439.29/x
  3. Step 3: Cross multiply
    22,990.82x = 31,715.42 × 15,439.29
  4. Step 4: Simplify right side
    22,990.82x = 489,663,566.85
  5. Step 5: Solve for x
    x = 489,663,566.85/22,990.82
  6. Step 6: Final answer
    x = 21,298.22

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1.5x scale

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.