Home / 20,742.31-28,621.43-11,787.89

Finding the Fourth Proportional to 20,742.31, 28,621.43 and 11,787.89

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Solution

The fourth proportional to 20,742.31, 28,621.43 and 11,787.89 is: 16,265.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.31 : 28,621.43 = 11,787.89 : x
  2. Step 2: Convert to fraction form
    20,742.31/28,621.43 = 11,787.89/x
  3. Step 3: Cross multiply
    20,742.31x = 28,621.43 × 11,787.89
  4. Step 4: Simplify right side
    20,742.31x = 337,386,268.48
  5. Step 5: Solve for x
    x = 337,386,268.48/20,742.31
  6. Step 6: Final answer
    x = 16,265.61

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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.