Home / 6,261.45-8,640.91-3,428.78

Finding the Fourth Proportional to 6,261.45, 8,640.91 and 3,428.78

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Solution

The fourth proportional to 6,261.45, 8,640.91 and 3,428.78 is: 4,731.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,261.45 : 8,640.91 = 3,428.78 : x
  2. Step 2: Convert to fraction form
    6,261.45/8,640.91 = 3,428.78/x
  3. Step 3: Cross multiply
    6,261.45x = 8,640.91 × 3,428.78
  4. Step 4: Simplify right side
    6,261.45x = 29,627,762.25
  5. Step 5: Solve for x
    x = 29,627,762.25/6,261.45
  6. Step 6: Final answer
    x = 4,731.77

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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.