Home / 20,734.31-28,612.22-11,780.57

Finding the Fourth Proportional to 20,734.31, 28,612.22 and 11,780.57

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Solution

The fourth proportional to 20,734.31, 28,612.22 and 11,780.57 is: 16,256.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,734.31 : 28,612.22 = 11,780.57 : x
  2. Step 2: Convert to fraction form
    20,734.31/28,612.22 = 11,780.57/x
  3. Step 3: Cross multiply
    20,734.31x = 28,612.22 × 11,780.57
  4. Step 4: Simplify right side
    20,734.31x = 337,068,058.60
  5. Step 5: Solve for x
    x = 337,068,058.60/20,734.31
  6. Step 6: Final answer
    x = 16,256.54

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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.