Home / 20,809.13-31,221.56-12,494.94

Finding the Fourth Proportional to 20,809.13, 31,221.56 and 12,494.94

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Solution

The fourth proportional to 20,809.13, 31,221.56 and 12,494.94 is: 18,747.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.13 : 31,221.56 = 12,494.94 : x
  2. Step 2: Convert to fraction form
    20,809.13/31,221.56 = 12,494.94/x
  3. Step 3: Cross multiply
    20,809.13x = 31,221.56 × 12,494.94
  4. Step 4: Simplify right side
    20,809.13x = 390,111,456.43
  5. Step 5: Solve for x
    x = 390,111,456.43/20,809.13
  6. Step 6: Final answer
    x = 18,747.13

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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.