Home / 20,631.38-30,947.47-6,780.38

Finding the Fourth Proportional to 20,631.38, 30,947.47 and 6,780.38

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Solution

The fourth proportional to 20,631.38, 30,947.47 and 6,780.38 is: 10,170.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.38 : 30,947.47 = 6,780.38 : x
  2. Step 2: Convert to fraction form
    20,631.38/30,947.47 = 6,780.38/x
  3. Step 3: Cross multiply
    20,631.38x = 30,947.47 × 6,780.38
  4. Step 4: Simplify right side
    20,631.38x = 209,835,434.95
  5. Step 5: Solve for x
    x = 209,835,434.95/20,631.38
  6. Step 6: Final answer
    x = 10,170.70

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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.