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Finding the Fourth Proportional to 11,879.19, 17,818.38 and 5,642.19

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Solution

The fourth proportional to 11,879.19, 17,818.38 and 5,642.19 is: 8,463.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,879.19 : 17,818.38 = 5,642.19 : x
  2. Step 2: Convert to fraction form
    11,879.19/17,818.38 = 5,642.19/x
  3. Step 3: Cross multiply
    11,879.19x = 17,818.38 × 5,642.19
  4. Step 4: Simplify right side
    11,879.19x = 100,534,685.45
  5. Step 5: Solve for x
    x = 100,534,685.45/11,879.19
  6. Step 6: Final answer
    x = 8,463.09

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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.