Home / 27,678.78-38,196.36-15,102.72

Finding the Fourth Proportional to 27,678.78, 38,196.36 and 15,102.72

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Solution

The fourth proportional to 27,678.78, 38,196.36 and 15,102.72 is: 20,841.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,678.78 : 38,196.36 = 15,102.72 : x
  2. Step 2: Convert to fraction form
    27,678.78/38,196.36 = 15,102.72/x
  3. Step 3: Cross multiply
    27,678.78x = 38,196.36 × 15,102.72
  4. Step 4: Simplify right side
    27,678.78x = 576,868,930.10
  5. Step 5: Solve for x
    x = 576,868,930.10/27,678.78
  6. Step 6: Final answer
    x = 20,841.56

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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.