Home / 20,521.28-30,777.46-5,528.05

Finding the Fourth Proportional to 20,521.28, 30,777.46 and 5,528.05

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Solution

The fourth proportional to 20,521.28, 30,777.46 and 5,528.05 is: 8,290.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,521.28 : 30,777.46 = 5,528.05 : x
  2. Step 2: Convert to fraction form
    20,521.28/30,777.46 = 5,528.05/x
  3. Step 3: Cross multiply
    20,521.28x = 30,777.46 × 5,528.05
  4. Step 4: Simplify right side
    20,521.28x = 170,139,246.99
  5. Step 5: Solve for x
    x = 170,139,246.99/20,521.28
  6. Step 6: Final answer
    x = 8,290.87

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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.