Home / 20,499.88-28,284.96-11,545.60

Finding the Fourth Proportional to 20,499.88, 28,284.96 and 11,545.60

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Solution

The fourth proportional to 20,499.88, 28,284.96 and 11,545.60 is: 15,930.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,499.88 : 28,284.96 = 11,545.60 : x
  2. Step 2: Convert to fraction form
    20,499.88/28,284.96 = 11,545.60/x
  3. Step 3: Cross multiply
    20,499.88x = 28,284.96 × 11,545.60
  4. Step 4: Simplify right side
    20,499.88x = 326,566,834.18
  5. Step 5: Solve for x
    x = 326,566,834.18/20,499.88
  6. Step 6: Final answer
    x = 15,930.18

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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.