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Finding the Fourth Proportional to 8,918.49, 13,377.86 and 4,238.98

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Solution

The fourth proportional to 8,918.49, 13,377.86 and 4,238.98 is: 6,358.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.49 : 13,377.86 = 4,238.98 : x
  2. Step 2: Convert to fraction form
    8,918.49/13,377.86 = 4,238.98/x
  3. Step 3: Cross multiply
    8,918.49x = 13,377.86 × 4,238.98
  4. Step 4: Simplify right side
    8,918.49x = 56,708,414.09
  5. Step 5: Solve for x
    x = 56,708,414.09/8,918.49
  6. Step 6: Final answer
    x = 6,358.53

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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.