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Finding the Fourth Proportional to 18,074.29, 27,108.87 and 6,986.20

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Solution

The fourth proportional to 18,074.29, 27,108.87 and 6,986.20 is: 10,478.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,074.29 : 27,108.87 = 6,986.20 : x
  2. Step 2: Convert to fraction form
    18,074.29/27,108.87 = 6,986.20/x
  3. Step 3: Cross multiply
    18,074.29x = 27,108.87 × 6,986.20
  4. Step 4: Simplify right side
    18,074.29x = 189,387,987.59
  5. Step 5: Solve for x
    x = 189,387,987.59/18,074.29
  6. Step 6: Final answer
    x = 10,478.31

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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.