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Finding the Fourth Proportional to 6,721.30, 10,081.95 and 4,258.90

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Solution

The fourth proportional to 6,721.30, 10,081.95 and 4,258.90 is: 6,388.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,721.30 : 10,081.95 = 4,258.90 : x
  2. Step 2: Convert to fraction form
    6,721.30/10,081.95 = 4,258.90/x
  3. Step 3: Cross multiply
    6,721.30x = 10,081.95 × 4,258.90
  4. Step 4: Simplify right side
    6,721.30x = 42,938,016.86
  5. Step 5: Solve for x
    x = 42,938,016.86/6,721.30
  6. Step 6: Final answer
    x = 6,388.35

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Similar ratio
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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.