Home / 20,385.96-28,130.97-11,432.22

Finding the Fourth Proportional to 20,385.96, 28,130.97 and 11,432.22

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Solution

The fourth proportional to 20,385.96, 28,130.97 and 11,432.22 is: 15,775.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,385.96 : 28,130.97 = 11,432.22 : x
  2. Step 2: Convert to fraction form
    20,385.96/28,130.97 = 11,432.22/x
  3. Step 3: Cross multiply
    20,385.96x = 28,130.97 × 11,432.22
  4. Step 4: Simplify right side
    20,385.96x = 321,599,437.85
  5. Step 5: Solve for x
    x = 321,599,437.85/20,385.96
  6. Step 6: Final answer
    x = 15,775.54

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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.