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Finding the Fourth Proportional to 18,698.20, 28,031.10 and 11,294.80

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Solution

The fourth proportional to 18,698.20, 28,031.10 and 11,294.80 is: 16,932.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,698.20 : 28,031.10 = 11,294.80 : x
  2. Step 2: Convert to fraction form
    18,698.20/28,031.10 = 11,294.80/x
  3. Step 3: Cross multiply
    18,698.20x = 28,031.10 × 11,294.80
  4. Step 4: Simplify right side
    18,698.20x = 316,605,668.28
  5. Step 5: Solve for x
    x = 316,605,668.28/18,698.20
  6. Step 6: Final answer
    x = 16,932.41

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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.