Home / 27,805.86-38,375.78-15,871.59

Finding the Fourth Proportional to 27,805.86, 38,375.78 and 15,871.59

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Solution

The fourth proportional to 27,805.86, 38,375.78 and 15,871.59 is: 21,904.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,805.86 : 38,375.78 = 15,871.59 : x
  2. Step 2: Convert to fraction form
    27,805.86/38,375.78 = 15,871.59/x
  3. Step 3: Cross multiply
    27,805.86x = 38,375.78 × 15,871.59
  4. Step 4: Simplify right side
    27,805.86x = 609,084,566.73
  5. Step 5: Solve for x
    x = 609,084,566.73/27,805.86
  6. Step 6: Final answer
    x = 21,904.90

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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.