Home / 20,646.60-28,476.43-13,921.57

Finding the Fourth Proportional to 20,646.60, 28,476.43 and 13,921.57

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Solution

The fourth proportional to 20,646.60, 28,476.43 and 13,921.57 is: 19,201.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,646.60 : 28,476.43 = 13,921.57 : x
  2. Step 2: Convert to fraction form
    20,646.60/28,476.43 = 13,921.57/x
  3. Step 3: Cross multiply
    20,646.60x = 28,476.43 × 13,921.57
  4. Step 4: Simplify right side
    20,646.60x = 396,436,613.60
  5. Step 5: Solve for x
    x = 396,436,613.60/20,646.60
  6. Step 6: Final answer
    x = 19,201.06

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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.