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Finding the Fourth Proportional to 8,378.82, 12,570.39 and 5,918.45

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Solution

The fourth proportional to 8,378.82, 12,570.39 and 5,918.45 is: 8,879.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,378.82 : 12,570.39 = 5,918.45 : x
  2. Step 2: Convert to fraction form
    8,378.82/12,570.39 = 5,918.45/x
  3. Step 3: Cross multiply
    8,378.82x = 12,570.39 × 5,918.45
  4. Step 4: Simplify right side
    8,378.82x = 74,397,161.84
  5. Step 5: Solve for x
    x = 74,397,161.84/8,378.82
  6. Step 6: Final answer
    x = 8,879.19

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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.