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Finding the Fourth Proportional to 9,369.76, 12,928.98 and 5,389.44

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Solution

The fourth proportional to 9,369.76, 12,928.98 and 5,389.44 is: 7,436.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,369.76 : 12,928.98 = 5,389.44 : x
  2. Step 2: Convert to fraction form
    9,369.76/12,928.98 = 5,389.44/x
  3. Step 3: Cross multiply
    9,369.76x = 12,928.98 × 5,389.44
  4. Step 4: Simplify right side
    9,369.76x = 69,679,961.97
  5. Step 5: Solve for x
    x = 69,679,961.97/9,369.76
  6. Step 6: Final answer
    x = 7,436.69

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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.