Home / 8,439.12-12,639.96-6,791.52

Finding the Fourth Proportional to 8,439.12, 12,639.96 and 6,791.52

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Solution

The fourth proportional to 8,439.12, 12,639.96 and 6,791.52 is: 10,172.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,439.12 : 12,639.96 = 6,791.52 : x
  2. Step 2: Convert to fraction form
    8,439.12/12,639.96 = 6,791.52/x
  3. Step 3: Cross multiply
    8,439.12x = 12,639.96 × 6,791.52
  4. Step 4: Simplify right side
    8,439.12x = 85,844,541.14
  5. Step 5: Solve for x
    x = 85,844,541.14/8,439.12
  6. Step 6: Final answer
    x = 10,172.21

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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.