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Finding the Fourth Proportional to 5,581.41, 8,372.11 and 1,685.81

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Solution

The fourth proportional to 5,581.41, 8,372.11 and 1,685.81 is: 2,528.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,581.41 : 8,372.11 = 1,685.81 : x
  2. Step 2: Convert to fraction form
    5,581.41/8,372.11 = 1,685.81/x
  3. Step 3: Cross multiply
    5,581.41x = 8,372.11 × 1,685.81
  4. Step 4: Simplify right side
    5,581.41x = 14,113,806.64
  5. Step 5: Solve for x
    x = 14,113,806.64/5,581.41
  6. Step 6: Final answer
    x = 2,528.72

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Double scale
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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.