Home / 20,689.12-28,524.30-15,032.08

Finding the Fourth Proportional to 20,689.12, 28,524.30 and 15,032.08

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Solution

The fourth proportional to 20,689.12, 28,524.30 and 15,032.08 is: 20,724.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.12 : 28,524.30 = 15,032.08 : x
  2. Step 2: Convert to fraction form
    20,689.12/28,524.30 = 15,032.08/x
  3. Step 3: Cross multiply
    20,689.12x = 28,524.30 × 15,032.08
  4. Step 4: Simplify right side
    20,689.12x = 428,779,559.54
  5. Step 5: Solve for x
    x = 428,779,559.54/20,689.12
  6. Step 6: Final answer
    x = 20,724.88

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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.