Home / 20,639.64-30,942.18-8,324.76

Finding the Fourth Proportional to 20,639.64, 30,942.18 and 8,324.76

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Solution

The fourth proportional to 20,639.64, 30,942.18 and 8,324.76 is: 12,480.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.64 : 30,942.18 = 8,324.76 : x
  2. Step 2: Convert to fraction form
    20,639.64/30,942.18 = 8,324.76/x
  3. Step 3: Cross multiply
    20,639.64x = 30,942.18 × 8,324.76
  4. Step 4: Simplify right side
    20,639.64x = 257,586,222.38
  5. Step 5: Solve for x
    x = 257,586,222.38/20,639.64
  6. Step 6: Final answer
    x = 12,480.17

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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.