Home / 20,529.20-28,330.20-11,097.68

Finding the Fourth Proportional to 20,529.20, 28,330.20 and 11,097.68

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Solution

The fourth proportional to 20,529.20, 28,330.20 and 11,097.68 is: 15,314.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,529.20 : 28,330.20 = 11,097.68 : x
  2. Step 2: Convert to fraction form
    20,529.20/28,330.20 = 11,097.68/x
  3. Step 3: Cross multiply
    20,529.20x = 28,330.20 × 11,097.68
  4. Step 4: Simplify right side
    20,529.20x = 314,399,493.94
  5. Step 5: Solve for x
    x = 314,399,493.94/20,529.20
  6. Step 6: Final answer
    x = 15,314.75

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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.