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Finding the Fourth Proportional to 16,991.80, 25,487.70 and 11,086.90

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Solution

The fourth proportional to 16,991.80, 25,487.70 and 11,086.90 is: 16,630.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,991.80 : 25,487.70 = 11,086.90 : x
  2. Step 2: Convert to fraction form
    16,991.80/25,487.70 = 11,086.90/x
  3. Step 3: Cross multiply
    16,991.80x = 25,487.70 × 11,086.90
  4. Step 4: Simplify right side
    16,991.80x = 282,579,581.13
  5. Step 5: Solve for x
    x = 282,579,581.13/16,991.80
  6. Step 6: Final answer
    x = 16,630.35

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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.