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Finding the Fourth Proportional to 8,918.82, 12,309.27 and 5,141.28

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Solution

The fourth proportional to 8,918.82, 12,309.27 and 5,141.28 is: 7,095.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.82 : 12,309.27 = 5,141.28 : x
  2. Step 2: Convert to fraction form
    8,918.82/12,309.27 = 5,141.28/x
  3. Step 3: Cross multiply
    8,918.82x = 12,309.27 × 5,141.28
  4. Step 4: Simplify right side
    8,918.82x = 63,285,403.67
  5. Step 5: Solve for x
    x = 63,285,403.67/8,918.82
  6. Step 6: Final answer
    x = 7,095.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.