Home / 27,897.78-38,498.58-15,321.72

Finding the Fourth Proportional to 27,897.78, 38,498.58 and 15,321.72

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Solution

The fourth proportional to 27,897.78, 38,498.58 and 15,321.72 is: 21,143.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,897.78 : 38,498.58 = 15,321.72 : x
  2. Step 2: Convert to fraction form
    27,897.78/38,498.58 = 15,321.72/x
  3. Step 3: Cross multiply
    27,897.78x = 38,498.58 × 15,321.72
  4. Step 4: Simplify right side
    27,897.78x = 589,864,463.16
  5. Step 5: Solve for x
    x = 589,864,463.16/27,897.78
  6. Step 6: Final answer
    x = 21,143.78

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Similar ratio
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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.