Home / 20,728.77-31,073.85-8,246.40

Finding the Fourth Proportional to 20,728.77, 31,073.85 and 8,246.40

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Solution

The fourth proportional to 20,728.77, 31,073.85 and 8,246.40 is: 12,361.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.77 : 31,073.85 = 8,246.40 : x
  2. Step 2: Convert to fraction form
    20,728.77/31,073.85 = 8,246.40/x
  3. Step 3: Cross multiply
    20,728.77x = 31,073.85 × 8,246.40
  4. Step 4: Simplify right side
    20,728.77x = 256,247,396.64
  5. Step 5: Solve for x
    x = 256,247,396.64/20,728.77
  6. Step 6: Final answer
    x = 12,361.92

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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.