Home / 8,959.82-12,364.79-5,420.97

Finding the Fourth Proportional to 8,959.82, 12,364.79 and 5,420.97

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Solution

The fourth proportional to 8,959.82, 12,364.79 and 5,420.97 is: 7,481.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,959.82 : 12,364.79 = 5,420.97 : x
  2. Step 2: Convert to fraction form
    8,959.82/12,364.79 = 5,420.97/x
  3. Step 3: Cross multiply
    8,959.82x = 12,364.79 × 5,420.97
  4. Step 4: Simplify right side
    8,959.82x = 67,029,128.54
  5. Step 5: Solve for x
    x = 67,029,128.54/8,959.82
  6. Step 6: Final answer
    x = 7,481.08

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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.