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Finding the Fourth Proportional to 18,952.76, 28,409.28 and 10,620.56

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Solution

The fourth proportional to 18,952.76, 28,409.28 and 10,620.56 is: 15,919.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,952.76 : 28,409.28 = 10,620.56 : x
  2. Step 2: Convert to fraction form
    18,952.76/28,409.28 = 10,620.56/x
  3. Step 3: Cross multiply
    18,952.76x = 28,409.28 × 10,620.56
  4. Step 4: Simplify right side
    18,952.76x = 301,722,462.80
  5. Step 5: Solve for x
    x = 301,722,462.80/18,952.76
  6. Step 6: Final answer
    x = 15,919.71

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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.