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Finding the Fourth Proportional to 18,274.65, 25,219.10 and 9,891.15

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Solution

The fourth proportional to 18,274.65, 25,219.10 and 9,891.15 is: 13,649.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,274.65 : 25,219.10 = 9,891.15 : x
  2. Step 2: Convert to fraction form
    18,274.65/25,219.10 = 9,891.15/x
  3. Step 3: Cross multiply
    18,274.65x = 25,219.10 × 9,891.15
  4. Step 4: Simplify right side
    18,274.65x = 249,445,900.97
  5. Step 5: Solve for x
    x = 249,445,900.97/18,274.65
  6. Step 6: Final answer
    x = 13,649.83

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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.