Home / 15,609.20-21,540.68-8,535.66

Finding the Fourth Proportional to 15,609.20, 21,540.68 and 8,535.66

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Solution

The fourth proportional to 15,609.20, 21,540.68 and 8,535.66 is: 11,779.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,609.20 : 21,540.68 = 8,535.66 : x
  2. Step 2: Convert to fraction form
    15,609.20/21,540.68 = 8,535.66/x
  3. Step 3: Cross multiply
    15,609.20x = 21,540.68 × 8,535.66
  4. Step 4: Simplify right side
    15,609.20x = 183,863,877.97
  5. Step 5: Solve for x
    x = 183,863,877.97/15,609.20
  6. Step 6: Final answer
    x = 11,779.20

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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.