Home / 20,715.38-31,069.82-6,864.38

Finding the Fourth Proportional to 20,715.38, 31,069.82 and 6,864.38

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Solution

The fourth proportional to 20,715.38, 31,069.82 and 6,864.38 is: 10,295.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.38 : 31,069.82 = 6,864.38 : x
  2. Step 2: Convert to fraction form
    20,715.38/31,069.82 = 6,864.38/x
  3. Step 3: Cross multiply
    20,715.38x = 31,069.82 × 6,864.38
  4. Step 4: Simplify right side
    20,715.38x = 213,275,051.01
  5. Step 5: Solve for x
    x = 213,275,051.01/20,715.38
  6. Step 6: Final answer
    x = 10,295.49

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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.