Home / 15,878.43-21,902.31-10,220.55

Finding the Fourth Proportional to 15,878.43, 21,902.31 and 10,220.55

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Solution

The fourth proportional to 15,878.43, 21,902.31 and 10,220.55 is: 14,097.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,878.43 : 21,902.31 = 10,220.55 : x
  2. Step 2: Convert to fraction form
    15,878.43/21,902.31 = 10,220.55/x
  3. Step 3: Cross multiply
    15,878.43x = 21,902.31 × 10,220.55
  4. Step 4: Simplify right side
    15,878.43x = 223,853,654.47
  5. Step 5: Solve for x
    x = 223,853,654.47/15,878.43
  6. Step 6: Final answer
    x = 14,097.97

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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.