Home / 27,687.90-38,209.44-15,112.65

Finding the Fourth Proportional to 27,687.90, 38,209.44 and 15,112.65

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Solution

The fourth proportional to 27,687.90, 38,209.44 and 15,112.65 is: 20,855.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,687.90 : 38,209.44 = 15,112.65 : x
  2. Step 2: Convert to fraction form
    27,687.90/38,209.44 = 15,112.65/x
  3. Step 3: Cross multiply
    27,687.90x = 38,209.44 × 15,112.65
  4. Step 4: Simplify right side
    27,687.90x = 577,445,893.42
  5. Step 5: Solve for x
    x = 577,445,893.42/27,687.90
  6. Step 6: Final answer
    x = 20,855.53

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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.