Home / 20,769.28-28,652.94-13,219.74

Finding the Fourth Proportional to 20,769.28, 28,652.94 and 13,219.74

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Solution

The fourth proportional to 20,769.28, 28,652.94 and 13,219.74 is: 18,237.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,769.28 : 28,652.94 = 13,219.74 : x
  2. Step 2: Convert to fraction form
    20,769.28/28,652.94 = 13,219.74/x
  3. Step 3: Cross multiply
    20,769.28x = 28,652.94 × 13,219.74
  4. Step 4: Simplify right side
    20,769.28x = 378,784,417.04
  5. Step 5: Solve for x
    x = 378,784,417.04/20,769.28
  6. Step 6: Final answer
    x = 18,237.73

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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.