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Finding the Fourth Proportional to 9,353.70, 12,908.84 and 5,376.20

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Solution

The fourth proportional to 9,353.70, 12,908.84 and 5,376.20 is: 7,419.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,353.70 : 12,908.84 = 5,376.20 : x
  2. Step 2: Convert to fraction form
    9,353.70/12,908.84 = 5,376.20/x
  3. Step 3: Cross multiply
    9,353.70x = 12,908.84 × 5,376.20
  4. Step 4: Simplify right side
    9,353.70x = 69,400,414.18
  5. Step 5: Solve for x
    x = 69,400,414.18/9,353.70
  6. Step 6: Final answer
    x = 7,419.57

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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.