Home / 11,107.25-15,318.07-9,215.83

Finding the Fourth Proportional to 11,107.25, 15,318.07 and 9,215.83

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Solution

The fourth proportional to 11,107.25, 15,318.07 and 9,215.83 is: 12,709.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,107.25 : 15,318.07 = 9,215.83 : x
  2. Step 2: Convert to fraction form
    11,107.25/15,318.07 = 9,215.83/x
  3. Step 3: Cross multiply
    11,107.25x = 15,318.07 × 9,215.83
  4. Step 4: Simplify right side
    11,107.25x = 141,168,729.05
  5. Step 5: Solve for x
    x = 141,168,729.05/11,107.25
  6. Step 6: Final answer
    x = 12,709.60

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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.