Home / 20,797,715.40-28,691,175.84-13,457,920.68

Finding the Fourth Proportional to 20,797,715.40, 28,691,175.84 and 13,457,920.68

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Solution

The fourth proportional to 20,797,715.40, 28,691,175.84 and 13,457,920.68 is: 18,565,672.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,797,715.40 : 28,691,175.84 = 13,457,920.68 : x
  2. Step 2: Convert to fraction form
    20,797,715.40/28,691,175.84 = 13,457,920.68/x
  3. Step 3: Cross multiply
    20,797,715.40x = 28,691,175.84 × 13,457,920.68
  4. Step 4: Simplify right side
    20,797,715.40x = 386,123,568,670,652.38
  5. Step 5: Solve for x
    x = 386,123,568,670,652.38/20,797,715.40
  6. Step 6: Final answer
    x = 18,565,672.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.