Home / 20,766.57-28,656.55-11,813.53

Finding the Fourth Proportional to 20,766.57, 28,656.55 and 11,813.53

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Solution

The fourth proportional to 20,766.57, 28,656.55 and 11,813.53 is: 16,301.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,766.57 : 28,656.55 = 11,813.53 : x
  2. Step 2: Convert to fraction form
    20,766.57/28,656.55 = 11,813.53/x
  3. Step 3: Cross multiply
    20,766.57x = 28,656.55 × 11,813.53
  4. Step 4: Simplify right side
    20,766.57x = 338,535,013.12
  5. Step 5: Solve for x
    x = 338,535,013.12/20,766.57
  6. Step 6: Final answer
    x = 16,301.92

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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.