Home / 20,790.48-28,691.25-11,358.84

Finding the Fourth Proportional to 20,790.48, 28,691.25 and 11,358.84

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Solution

The fourth proportional to 20,790.48, 28,691.25 and 11,358.84 is: 15,675.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.48 : 28,691.25 = 11,358.84 : x
  2. Step 2: Convert to fraction form
    20,790.48/28,691.25 = 11,358.84/x
  3. Step 3: Cross multiply
    20,790.48x = 28,691.25 × 11,358.84
  4. Step 4: Simplify right side
    20,790.48x = 325,899,318.15
  5. Step 5: Solve for x
    x = 325,899,318.15/20,790.48
  6. Step 6: Final answer
    x = 15,675.41

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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.