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Finding the Fourth Proportional to 18,943.65, 28,410.03 and 7,254.18

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Solution

The fourth proportional to 18,943.65, 28,410.03 and 7,254.18 is: 10,879.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,943.65 : 28,410.03 = 7,254.18 : x
  2. Step 2: Convert to fraction form
    18,943.65/28,410.03 = 7,254.18/x
  3. Step 3: Cross multiply
    18,943.65x = 28,410.03 × 7,254.18
  4. Step 4: Simplify right side
    18,943.65x = 206,091,471.43
  5. Step 5: Solve for x
    x = 206,091,471.43/18,943.65
  6. Step 6: Final answer
    x = 10,879.18

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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.