Home / 20,890.54-31,287.53-12,552.17

Finding the Fourth Proportional to 20,890.54, 31,287.53 and 12,552.17

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Solution

The fourth proportional to 20,890.54, 31,287.53 and 12,552.17 is: 18,799.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.54 : 31,287.53 = 12,552.17 : x
  2. Step 2: Convert to fraction form
    20,890.54/31,287.53 = 12,552.17/x
  3. Step 3: Cross multiply
    20,890.54x = 31,287.53 × 12,552.17
  4. Step 4: Simplify right side
    20,890.54x = 392,726,270.38
  5. Step 5: Solve for x
    x = 392,726,270.38/20,890.54
  6. Step 6: Final answer
    x = 18,799.24

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1.5x scale

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.