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Finding the Fourth Proportional to 10,808.32, 16,216.80 and 5,612.80

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Solution

The fourth proportional to 10,808.32, 16,216.80 and 5,612.80 is: 8,421.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,808.32 : 16,216.80 = 5,612.80 : x
  2. Step 2: Convert to fraction form
    10,808.32/16,216.80 = 5,612.80/x
  3. Step 3: Cross multiply
    10,808.32x = 16,216.80 × 5,612.80
  4. Step 4: Simplify right side
    10,808.32x = 91,021,655.04
  5. Step 5: Solve for x
    x = 91,021,655.04/10,808.32
  6. Step 6: Final answer
    x = 8,421.44

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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.