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Finding the Fourth Proportional to 10,808.60, 16,212.90 and 8,986.10

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Solution

The fourth proportional to 10,808.60, 16,212.90 and 8,986.10 is: 13,479.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,808.60 : 16,212.90 = 8,986.10 : x
  2. Step 2: Convert to fraction form
    10,808.60/16,212.90 = 8,986.10/x
  3. Step 3: Cross multiply
    10,808.60x = 16,212.90 × 8,986.10
  4. Step 4: Simplify right side
    10,808.60x = 145,690,740.69
  5. Step 5: Solve for x
    x = 145,690,740.69/10,808.60
  6. Step 6: Final answer
    x = 13,479.15

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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.