Home / 28,147.85-38,843.71-15,400.89

Finding the Fourth Proportional to 28,147.85, 38,843.71 and 15,400.89

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Solution

The fourth proportional to 28,147.85, 38,843.71 and 15,400.89 is: 21,253.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,147.85 : 38,843.71 = 15,400.89 : x
  2. Step 2: Convert to fraction form
    28,147.85/38,843.71 = 15,400.89/x
  3. Step 3: Cross multiply
    28,147.85x = 38,843.71 × 15,400.89
  4. Step 4: Simplify right side
    28,147.85x = 598,227,590.12
  5. Step 5: Solve for x
    x = 598,227,590.12/28,147.85
  6. Step 6: Final answer
    x = 21,253.04

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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.