Home / 20,402.55-28,154.79-11,450.43

Finding the Fourth Proportional to 20,402.55, 28,154.79 and 11,450.43

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Solution

The fourth proportional to 20,402.55, 28,154.79 and 11,450.43 is: 15,801.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,402.55 : 28,154.79 = 11,450.43 : x
  2. Step 2: Convert to fraction form
    20,402.55/28,154.79 = 11,450.43/x
  3. Step 3: Cross multiply
    20,402.55x = 28,154.79 × 11,450.43
  4. Step 4: Simplify right side
    20,402.55x = 322,384,452.06
  5. Step 5: Solve for x
    x = 322,384,452.06/20,402.55
  6. Step 6: Final answer
    x = 15,801.18

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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.