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Finding the Fourth Proportional to 10,991.52, 16,487.01 and 3,200.40

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Solution

The fourth proportional to 10,991.52, 16,487.01 and 3,200.40 is: 4,800.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,991.52 : 16,487.01 = 3,200.40 : x
  2. Step 2: Convert to fraction form
    10,991.52/16,487.01 = 3,200.40/x
  3. Step 3: Cross multiply
    10,991.52x = 16,487.01 × 3,200.40
  4. Step 4: Simplify right side
    10,991.52x = 52,765,026.80
  5. Step 5: Solve for x
    x = 52,765,026.80/10,991.52
  6. Step 6: Final answer
    x = 4,800.52

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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.