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Finding the Fourth Proportional to 17,991.70, 26,951.10 and 10,191.40

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Solution

The fourth proportional to 17,991.70, 26,951.10 and 10,191.40 is: 15,266.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,991.70 : 26,951.10 = 10,191.40 : x
  2. Step 2: Convert to fraction form
    17,991.70/26,951.10 = 10,191.40/x
  3. Step 3: Cross multiply
    17,991.70x = 26,951.10 × 10,191.40
  4. Step 4: Simplify right side
    17,991.70x = 274,669,440.54
  5. Step 5: Solve for x
    x = 274,669,440.54/17,991.70
  6. Step 6: Final answer
    x = 15,266.45

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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.