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Finding the Fourth Proportional to 8,815.10, 12,162.76 and 6,453.14

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Solution

The fourth proportional to 8,815.10, 12,162.76 and 6,453.14 is: 8,903.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,815.10 : 12,162.76 = 6,453.14 : x
  2. Step 2: Convert to fraction form
    8,815.10/12,162.76 = 6,453.14/x
  3. Step 3: Cross multiply
    8,815.10x = 12,162.76 × 6,453.14
  4. Step 4: Simplify right side
    8,815.10x = 78,487,916.12
  5. Step 5: Solve for x
    x = 78,487,916.12/8,815.10
  6. Step 6: Final answer
    x = 8,903.81

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.