Home / 27,678.08-38,207.16-20,963.72

Finding the Fourth Proportional to 27,678.08, 38,207.16 and 20,963.72

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Solution

The fourth proportional to 27,678.08, 38,207.16 and 20,963.72 is: 28,938.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,678.08 : 38,207.16 = 20,963.72 : x
  2. Step 2: Convert to fraction form
    27,678.08/38,207.16 = 20,963.72/x
  3. Step 3: Cross multiply
    27,678.08x = 38,207.16 × 20,963.72
  4. Step 4: Simplify right side
    27,678.08x = 800,964,204.24
  5. Step 5: Solve for x
    x = 800,964,204.24/27,678.08
  6. Step 6: Final answer
    x = 28,938.58

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Double scale
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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.