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Finding the Fourth Proportional to 27,147.12, 40,721.16 and 8,679.12

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Solution

The fourth proportional to 27,147.12, 40,721.16 and 8,679.12 is: 13,018.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,147.12 : 40,721.16 = 8,679.12 : x
  2. Step 2: Convert to fraction form
    27,147.12/40,721.16 = 8,679.12/x
  3. Step 3: Cross multiply
    27,147.12x = 40,721.16 × 8,679.12
  4. Step 4: Simplify right side
    27,147.12x = 353,423,834.18
  5. Step 5: Solve for x
    x = 353,423,834.18/27,147.12
  6. Step 6: Final answer
    x = 13,018.83

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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.