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Finding the Fourth Proportional to 18,959.34, 28,442.67 and 7,271.65

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Solution

The fourth proportional to 18,959.34, 28,442.67 and 7,271.65 is: 10,908.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,959.34 : 28,442.67 = 7,271.65 : x
  2. Step 2: Convert to fraction form
    18,959.34/28,442.67 = 7,271.65/x
  3. Step 3: Cross multiply
    18,959.34x = 28,442.67 × 7,271.65
  4. Step 4: Simplify right side
    18,959.34x = 206,825,090.05
  5. Step 5: Solve for x
    x = 206,825,090.05/18,959.34
  6. Step 6: Final answer
    x = 10,908.88

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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.