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Finding the Fourth Proportional to 9,362.28, 12,918.78 and 5,169.72

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Solution

The fourth proportional to 9,362.28, 12,918.78 and 5,169.72 is: 7,133.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,362.28 : 12,918.78 = 5,169.72 : x
  2. Step 2: Convert to fraction form
    9,362.28/12,918.78 = 5,169.72/x
  3. Step 3: Cross multiply
    9,362.28x = 12,918.78 × 5,169.72
  4. Step 4: Simplify right side
    9,362.28x = 66,786,475.34
  5. Step 5: Solve for x
    x = 66,786,475.34/9,362.28
  6. Step 6: Final answer
    x = 7,133.57

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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.