Home / 20,552.86-28,363.02-11,121.42

Finding the Fourth Proportional to 20,552.86, 28,363.02 and 11,121.42

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Solution

The fourth proportional to 20,552.86, 28,363.02 and 11,121.42 is: 15,347.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,552.86 : 28,363.02 = 11,121.42 : x
  2. Step 2: Convert to fraction form
    20,552.86/28,363.02 = 11,121.42/x
  3. Step 3: Cross multiply
    20,552.86x = 28,363.02 × 11,121.42
  4. Step 4: Simplify right side
    20,552.86x = 315,437,205.96
  5. Step 5: Solve for x
    x = 315,437,205.96/20,552.86
  6. Step 6: Final answer
    x = 15,347.61

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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.