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Finding the Fourth Proportional to 6,611.10, 9,916.64 and 1,680.76

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Solution

The fourth proportional to 6,611.10, 9,916.64 and 1,680.76 is: 2,521.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,611.10 : 9,916.64 = 1,680.76 : x
  2. Step 2: Convert to fraction form
    6,611.10/9,916.64 = 1,680.76/x
  3. Step 3: Cross multiply
    6,611.10x = 9,916.64 × 1,680.76
  4. Step 4: Simplify right side
    6,611.10x = 16,667,491.85
  5. Step 5: Solve for x
    x = 16,667,491.85/6,611.10
  6. Step 6: Final answer
    x = 2,521.14

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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.