Home / 6,921.78-10,385.10-4,321.68

Finding the Fourth Proportional to 6,921.78, 10,385.10 and 4,321.68

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Solution

The fourth proportional to 6,921.78, 10,385.10 and 4,321.68 is: 6,484.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,921.78 : 10,385.10 = 4,321.68 : x
  2. Step 2: Convert to fraction form
    6,921.78/10,385.10 = 4,321.68/x
  3. Step 3: Cross multiply
    6,921.78x = 10,385.10 × 4,321.68
  4. Step 4: Simplify right side
    6,921.78x = 44,881,078.97
  5. Step 5: Solve for x
    x = 44,881,078.97/6,921.78
  6. Step 6: Final answer
    x = 6,484.04

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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.