Home / 18,974.30-28,470.10-7,889.18

Finding the Fourth Proportional to 18,974.30, 28,470.10 and 7,889.18

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Solution

The fourth proportional to 18,974.30, 28,470.10 and 7,889.18 is: 11,837.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,974.30 : 28,470.10 = 7,889.18 : x
  2. Step 2: Convert to fraction form
    18,974.30/28,470.10 = 7,889.18/x
  3. Step 3: Cross multiply
    18,974.30x = 28,470.10 × 7,889.18
  4. Step 4: Simplify right side
    18,974.30x = 224,605,743.52
  5. Step 5: Solve for x
    x = 224,605,743.52/18,974.30
  6. Step 6: Final answer
    x = 11,837.37

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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.