Home / 20,854.30-28,778.80-11,294.03

Finding the Fourth Proportional to 20,854.30, 28,778.80 and 11,294.03

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Solution

The fourth proportional to 20,854.30, 28,778.80 and 11,294.03 is: 15,585.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.30 : 28,778.80 = 11,294.03 : x
  2. Step 2: Convert to fraction form
    20,854.30/28,778.80 = 11,294.03/x
  3. Step 3: Cross multiply
    20,854.30x = 28,778.80 × 11,294.03
  4. Step 4: Simplify right side
    20,854.30x = 325,028,790.17
  5. Step 5: Solve for x
    x = 325,028,790.17/20,854.30
  6. Step 6: Final answer
    x = 15,585.70

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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.