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Finding the Fourth Proportional to 9,367.21, 12,928.22 and 5,387.49

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Solution

The fourth proportional to 9,367.21, 12,928.22 and 5,387.49 is: 7,435.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,367.21 : 12,928.22 = 5,387.49 : x
  2. Step 2: Convert to fraction form
    9,367.21/12,928.22 = 5,387.49/x
  3. Step 3: Cross multiply
    9,367.21x = 12,928.22 × 5,387.49
  4. Step 4: Simplify right side
    9,367.21x = 69,650,655.97
  5. Step 5: Solve for x
    x = 69,650,655.97/9,367.21
  6. Step 6: Final answer
    x = 7,435.58

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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.