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Finding the Fourth Proportional to 13,326.95, 18,391.07 and 7,358.49

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Solution

The fourth proportional to 13,326.95, 18,391.07 and 7,358.49 is: 10,154.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,326.95 : 18,391.07 = 7,358.49 : x
  2. Step 2: Convert to fraction form
    13,326.95/18,391.07 = 7,358.49/x
  3. Step 3: Cross multiply
    13,326.95x = 18,391.07 × 7,358.49
  4. Step 4: Simplify right side
    13,326.95x = 135,330,523.08
  5. Step 5: Solve for x
    x = 135,330,523.08/13,326.95
  6. Step 6: Final answer
    x = 10,154.65

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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.