Home / 20,777.71-31,177.91-12,029.71

Finding the Fourth Proportional to 20,777.71, 31,177.91 and 12,029.71

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Solution

The fourth proportional to 20,777.71, 31,177.91 and 12,029.71 is: 18,051.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,777.71 : 31,177.91 = 12,029.71 : x
  2. Step 2: Convert to fraction form
    20,777.71/31,177.91 = 12,029.71/x
  3. Step 3: Cross multiply
    20,777.71x = 31,177.91 × 12,029.71
  4. Step 4: Simplify right side
    20,777.71x = 375,061,155.56
  5. Step 5: Solve for x
    x = 375,061,155.56/20,777.71
  6. Step 6: Final answer
    x = 18,051.13

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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.