Home / 28,170.22-38,876.88-15,595.78

Finding the Fourth Proportional to 28,170.22, 38,876.88 and 15,595.78

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Solution

The fourth proportional to 28,170.22, 38,876.88 and 15,595.78 is: 21,523.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,170.22 : 38,876.88 = 15,595.78 : x
  2. Step 2: Convert to fraction form
    28,170.22/38,876.88 = 15,595.78/x
  3. Step 3: Cross multiply
    28,170.22x = 38,876.88 × 15,595.78
  4. Step 4: Simplify right side
    28,170.22x = 606,315,267.57
  5. Step 5: Solve for x
    x = 606,315,267.57/28,170.22
  6. Step 6: Final answer
    x = 21,523.27

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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.