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Finding the Fourth Proportional to 18,031.66, 24,879.09 and 10,958.20

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Solution

The fourth proportional to 18,031.66, 24,879.09 and 10,958.20 is: 15,119.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,031.66 : 24,879.09 = 10,958.20 : x
  2. Step 2: Convert to fraction form
    18,031.66/24,879.09 = 10,958.20/x
  3. Step 3: Cross multiply
    18,031.66x = 24,879.09 × 10,958.20
  4. Step 4: Simplify right side
    18,031.66x = 272,630,044.04
  5. Step 5: Solve for x
    x = 272,630,044.04/18,031.66
  6. Step 6: Final answer
    x = 15,119.52

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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.