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Finding the Fourth Proportional to 27,279.30, 40,919.74 and 10,638.66

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Solution

The fourth proportional to 27,279.30, 40,919.74 and 10,638.66 is: 15,958.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,279.30 : 40,919.74 = 10,638.66 : x
  2. Step 2: Convert to fraction form
    27,279.30/40,919.74 = 10,638.66/x
  3. Step 3: Cross multiply
    27,279.30x = 40,919.74 × 10,638.66
  4. Step 4: Simplify right side
    27,279.30x = 435,331,201.15
  5. Step 5: Solve for x
    x = 435,331,201.15/27,279.30
  6. Step 6: Final answer
    x = 15,958.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.