Home / 6,319.91-8,721.38-3,487.57

Finding the Fourth Proportional to 6,319.91, 8,721.38 and 3,487.57

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Solution

The fourth proportional to 6,319.91, 8,721.38 and 3,487.57 is: 4,812.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,319.91 : 8,721.38 = 3,487.57 : x
  2. Step 2: Convert to fraction form
    6,319.91/8,721.38 = 3,487.57/x
  3. Step 3: Cross multiply
    6,319.91x = 8,721.38 × 3,487.57
  4. Step 4: Simplify right side
    6,319.91x = 30,416,423.25
  5. Step 5: Solve for x
    x = 30,416,423.25/6,319.91
  6. Step 6: Final answer
    x = 4,812.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.