Home / 8,639.42-12,962.78-5,136.12

Finding the Fourth Proportional to 8,639.42, 12,962.78 and 5,136.12

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Solution

The fourth proportional to 8,639.42, 12,962.78 and 5,136.12 is: 7,706.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.42 : 12,962.78 = 5,136.12 : x
  2. Step 2: Convert to fraction form
    8,639.42/12,962.78 = 5,136.12/x
  3. Step 3: Cross multiply
    8,639.42x = 12,962.78 × 5,136.12
  4. Step 4: Simplify right side
    8,639.42x = 66,578,367.93
  5. Step 5: Solve for x
    x = 66,578,367.93/8,639.42
  6. Step 6: Final answer
    x = 7,706.35

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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.