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Finding the Fourth Proportional to 18,891.29, 28,343.09 and 9,031.34

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Solution

The fourth proportional to 18,891.29, 28,343.09 and 9,031.34 is: 13,549.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,891.29 : 28,343.09 = 9,031.34 : x
  2. Step 2: Convert to fraction form
    18,891.29/28,343.09 = 9,031.34/x
  3. Step 3: Cross multiply
    18,891.29x = 28,343.09 × 9,031.34
  4. Step 4: Simplify right side
    18,891.29x = 255,976,037.28
  5. Step 5: Solve for x
    x = 255,976,037.28/18,891.29
  6. Step 6: Final answer
    x = 13,549.95

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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.