Home / 28,872.53-39,842.97-18,123.20

Finding the Fourth Proportional to 28,872.53, 39,842.97 and 18,123.20

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Solution

The fourth proportional to 28,872.53, 39,842.97 and 18,123.20 is: 25,009.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,872.53 : 39,842.97 = 18,123.20 : x
  2. Step 2: Convert to fraction form
    28,872.53/39,842.97 = 18,123.20/x
  3. Step 3: Cross multiply
    28,872.53x = 39,842.97 × 18,123.20
  4. Step 4: Simplify right side
    28,872.53x = 722,081,996.14
  5. Step 5: Solve for x
    x = 722,081,996.14/28,872.53
  6. Step 6: Final answer
    x = 25,009.31

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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.