Home / 20,434.14-28,217.55-12,893.85

Finding the Fourth Proportional to 20,434.14, 28,217.55 and 12,893.85

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Solution

The fourth proportional to 20,434.14, 28,217.55 and 12,893.85 is: 17,805.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,434.14 : 28,217.55 = 12,893.85 : x
  2. Step 2: Convert to fraction form
    20,434.14/28,217.55 = 12,893.85/x
  3. Step 3: Cross multiply
    20,434.14x = 28,217.55 × 12,893.85
  4. Step 4: Simplify right side
    20,434.14x = 363,832,857.07
  5. Step 5: Solve for x
    x = 363,832,857.07/20,434.14
  6. Step 6: Final answer
    x = 17,805.15

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1.5x scale

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.