Home / 20,445.75-28,215.14-12,062.25

Finding the Fourth Proportional to 20,445.75, 28,215.14 and 12,062.25

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Solution

The fourth proportional to 20,445.75, 28,215.14 and 12,062.25 is: 16,645.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,445.75 : 28,215.14 = 12,062.25 : x
  2. Step 2: Convert to fraction form
    20,445.75/28,215.14 = 12,062.25/x
  3. Step 3: Cross multiply
    20,445.75x = 28,215.14 × 12,062.25
  4. Step 4: Simplify right side
    20,445.75x = 340,338,012.15
  5. Step 5: Solve for x
    x = 340,338,012.15/20,445.75
  6. Step 6: Final answer
    x = 16,645.91

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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.