Home / 20,405.05-30,616.29-8,561.76

Finding the Fourth Proportional to 20,405.05, 30,616.29 and 8,561.76

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Solution

The fourth proportional to 20,405.05, 30,616.29 and 8,561.76 is: 12,846.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,405.05 : 30,616.29 = 8,561.76 : x
  2. Step 2: Convert to fraction form
    20,405.05/30,616.29 = 8,561.76/x
  3. Step 3: Cross multiply
    20,405.05x = 30,616.29 × 8,561.76
  4. Step 4: Simplify right side
    20,405.05x = 262,129,439.57
  5. Step 5: Solve for x
    x = 262,129,439.57/20,405.05
  6. Step 6: Final answer
    x = 12,846.30

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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.