Home / 6,319.78-8,721.33-3,487.19

Finding the Fourth Proportional to 6,319.78, 8,721.33 and 3,487.19

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Solution

The fourth proportional to 6,319.78, 8,721.33 and 3,487.19 is: 4,812.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,319.78 : 8,721.33 = 3,487.19 : x
  2. Step 2: Convert to fraction form
    6,319.78/8,721.33 = 3,487.19/x
  3. Step 3: Cross multiply
    6,319.78x = 8,721.33 × 3,487.19
  4. Step 4: Simplify right side
    6,319.78x = 30,412,917.33
  5. Step 5: Solve for x
    x = 30,412,917.33/6,319.78
  6. Step 6: Final answer
    x = 4,812.34

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Half scale
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Double scale
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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.