Home / 20,372.32-28,083.76-15,891.04

Finding the Fourth Proportional to 20,372.32, 28,083.76 and 15,891.04

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Solution

The fourth proportional to 20,372.32, 28,083.76 and 15,891.04 is: 21,906.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,372.32 : 28,083.76 = 15,891.04 : x
  2. Step 2: Convert to fraction form
    20,372.32/28,083.76 = 15,891.04/x
  3. Step 3: Cross multiply
    20,372.32x = 28,083.76 × 15,891.04
  4. Step 4: Simplify right side
    20,372.32x = 446,280,153.51
  5. Step 5: Solve for x
    x = 446,280,153.51/20,372.32
  6. Step 6: Final answer
    x = 21,906.20

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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.