Home / 8,639.42-12,960.60-2,715.18

Finding the Fourth Proportional to 8,639.42, 12,960.60 and 2,715.18

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Solution

The fourth proportional to 8,639.42, 12,960.60 and 2,715.18 is: 4,073.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.42 : 12,960.60 = 2,715.18 : x
  2. Step 2: Convert to fraction form
    8,639.42/12,960.60 = 2,715.18/x
  3. Step 3: Cross multiply
    8,639.42x = 12,960.60 × 2,715.18
  4. Step 4: Simplify right side
    8,639.42x = 35,190,361.91
  5. Step 5: Solve for x
    x = 35,190,361.91/8,639.42
  6. Step 6: Final answer
    x = 4,073.23

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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.