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Finding the Fourth Proportional to 18,891.90, 28,344.02 and 9,031.95

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Solution

The fourth proportional to 18,891.90, 28,344.02 and 9,031.95 is: 13,550.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,891.90 : 28,344.02 = 9,031.95 : x
  2. Step 2: Convert to fraction form
    18,891.90/28,344.02 = 9,031.95/x
  3. Step 3: Cross multiply
    18,891.90x = 28,344.02 × 9,031.95
  4. Step 4: Simplify right side
    18,891.90x = 256,001,771.44
  5. Step 5: Solve for x
    x = 256,001,771.44/18,891.90
  6. Step 6: Final answer
    x = 13,550.87

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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.