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Finding the Fourth Proportional to 6,143.72, 8,478 and 3,490.76

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Solution

The fourth proportional to 6,143.72, 8,478 and 3,490.76 is: 4,817.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,143.72 : 8,478 = 3,490.76 : x
  2. Step 2: Convert to fraction form
    6,143.72/8,478 = 3,490.76/x
  3. Step 3: Cross multiply
    6,143.72x = 8,478 × 3,490.76
  4. Step 4: Simplify right side
    6,143.72x = 29,594,663.28
  5. Step 5: Solve for x
    x = 29,594,663.28/6,143.72
  6. Step 6: Final answer
    x = 4,817.06

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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.