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Finding the Fourth Proportional to 9,340.31, 12,889.63 and 5,361.68

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Solution

The fourth proportional to 9,340.31, 12,889.63 and 5,361.68 is: 7,399.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,340.31 : 12,889.63 = 5,361.68 : x
  2. Step 2: Convert to fraction form
    9,340.31/12,889.63 = 5,361.68/x
  3. Step 3: Cross multiply
    9,340.31x = 12,889.63 × 5,361.68
  4. Step 4: Simplify right side
    9,340.31x = 69,110,092.18
  5. Step 5: Solve for x
    x = 69,110,092.18/9,340.31
  6. Step 6: Final answer
    x = 7,399.12

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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.