Home / 20,641.30-28,489.53-13,568.38

Finding the Fourth Proportional to 20,641.30, 28,489.53 and 13,568.38

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Solution

The fourth proportional to 20,641.30, 28,489.53 and 13,568.38 is: 18,727.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,641.30 : 28,489.53 = 13,568.38 : x
  2. Step 2: Convert to fraction form
    20,641.30/28,489.53 = 13,568.38/x
  3. Step 3: Cross multiply
    20,641.30x = 28,489.53 × 13,568.38
  4. Step 4: Simplify right side
    20,641.30x = 386,556,769.06
  5. Step 5: Solve for x
    x = 386,556,769.06/20,641.30
  6. Step 6: Final answer
    x = 18,727.35

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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.