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Finding the Fourth Proportional to 8,690.99, 12,924.68 and 8,414.19

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Solution

The fourth proportional to 8,690.99, 12,924.68 and 8,414.19 is: 12,513.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,690.99 : 12,924.68 = 8,414.19 : x
  2. Step 2: Convert to fraction form
    8,690.99/12,924.68 = 8,414.19/x
  3. Step 3: Cross multiply
    8,690.99x = 12,924.68 × 8,414.19
  4. Step 4: Simplify right side
    8,690.99x = 108,750,671.14
  5. Step 5: Solve for x
    x = 108,750,671.14/8,690.99
  6. Step 6: Final answer
    x = 12,513.04

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