Home / 7,217.72-10,812.76-4,287.12

Finding the Fourth Proportional to 7,217.72, 10,812.76 and 4,287.12

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Solution

The fourth proportional to 7,217.72, 10,812.76 and 4,287.12 is: 6,422.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,217.72 : 10,812.76 = 4,287.12 : x
  2. Step 2: Convert to fraction form
    7,217.72/10,812.76 = 4,287.12/x
  3. Step 3: Cross multiply
    7,217.72x = 10,812.76 × 4,287.12
  4. Step 4: Simplify right side
    7,217.72x = 46,355,599.65
  5. Step 5: Solve for x
    x = 46,355,599.65/7,217.72
  6. Step 6: Final answer
    x = 6,422.47

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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.