Home / 20,939.28-31,405.65-13,595.82

Finding the Fourth Proportional to 20,939.28, 31,405.65 and 13,595.82

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Solution

The fourth proportional to 20,939.28, 31,405.65 and 13,595.82 is: 20,391.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.28 : 31,405.65 = 13,595.82 : x
  2. Step 2: Convert to fraction form
    20,939.28/31,405.65 = 13,595.82/x
  3. Step 3: Cross multiply
    20,939.28x = 31,405.65 × 13,595.82
  4. Step 4: Simplify right side
    20,939.28x = 426,985,564.38
  5. Step 5: Solve for x
    x = 426,985,564.38/20,939.28
  6. Step 6: Final answer
    x = 20,391.61

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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.