Home / 20,486.28-28,272.33-11,988.57

Finding the Fourth Proportional to 20,486.28, 28,272.33 and 11,988.57

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Solution

The fourth proportional to 20,486.28, 28,272.33 and 11,988.57 is: 16,544.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,486.28 : 28,272.33 = 11,988.57 : x
  2. Step 2: Convert to fraction form
    20,486.28/28,272.33 = 11,988.57/x
  3. Step 3: Cross multiply
    20,486.28x = 28,272.33 × 11,988.57
  4. Step 4: Simplify right side
    20,486.28x = 338,944,807.27
  5. Step 5: Solve for x
    x = 338,944,807.27/20,486.28
  6. Step 6: Final answer
    x = 16,544.97

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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.