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Finding the Fourth Proportional to 10,808.40, 16,212.60 and 8,965.20

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Solution

The fourth proportional to 10,808.40, 16,212.60 and 8,965.20 is: 13,447.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,808.40 : 16,212.60 = 8,965.20 : x
  2. Step 2: Convert to fraction form
    10,808.40/16,212.60 = 8,965.20/x
  3. Step 3: Cross multiply
    10,808.40x = 16,212.60 × 8,965.20
  4. Step 4: Simplify right side
    10,808.40x = 145,349,201.52
  5. Step 5: Solve for x
    x = 145,349,201.52/10,808.40
  6. Step 6: Final answer
    x = 13,447.80

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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.