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Finding the Fourth Proportional to 11,387.70, 17,085.60 and 10,982.70

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Solution

The fourth proportional to 11,387.70, 17,085.60 and 10,982.70 is: 16,477.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,387.70 : 17,085.60 = 10,982.70 : x
  2. Step 2: Convert to fraction form
    11,387.70/17,085.60 = 10,982.70/x
  3. Step 3: Cross multiply
    11,387.70x = 17,085.60 × 10,982.70
  4. Step 4: Simplify right side
    11,387.70x = 187,646,019.12
  5. Step 5: Solve for x
    x = 187,646,019.12/11,387.70
  6. Step 6: Final answer
    x = 16,477.96

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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.