Home / 20,782.11-31,177.85-6,930.75

Finding the Fourth Proportional to 20,782.11, 31,177.85 and 6,930.75

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Solution

The fourth proportional to 20,782.11, 31,177.85 and 6,930.75 is: 10,397.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,782.11 : 31,177.85 = 6,930.75 : x
  2. Step 2: Convert to fraction form
    20,782.11/31,177.85 = 6,930.75/x
  3. Step 3: Cross multiply
    20,782.11x = 31,177.85 × 6,930.75
  4. Step 4: Simplify right side
    20,782.11x = 216,085,849.23
  5. Step 5: Solve for x
    x = 216,085,849.23/20,782.11
  6. Step 6: Final answer
    x = 10,397.69

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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.