Home / 8,620.05-11,900.66-5,641.09

Finding the Fourth Proportional to 8,620.05, 11,900.66 and 5,641.09

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Solution

The fourth proportional to 8,620.05, 11,900.66 and 5,641.09 is: 7,787.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,620.05 : 11,900.66 = 5,641.09 : x
  2. Step 2: Convert to fraction form
    8,620.05/11,900.66 = 5,641.09/x
  3. Step 3: Cross multiply
    8,620.05x = 11,900.66 × 5,641.09
  4. Step 4: Simplify right side
    8,620.05x = 67,132,678.47
  5. Step 5: Solve for x
    x = 67,132,678.47/8,620.05
  6. Step 6: Final answer
    x = 7,787.97

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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.