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Finding the Fourth Proportional to 9,702.38, 13,389.28 and 5,286.38

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Solution

The fourth proportional to 9,702.38, 13,389.28 and 5,286.38 is: 7,295.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,702.38 : 13,389.28 = 5,286.38 : x
  2. Step 2: Convert to fraction form
    9,702.38/13,389.28 = 5,286.38/x
  3. Step 3: Cross multiply
    9,702.38x = 13,389.28 × 5,286.38
  4. Step 4: Simplify right side
    9,702.38x = 70,780,741.84
  5. Step 5: Solve for x
    x = 70,780,741.84/9,702.38
  6. Step 6: Final answer
    x = 7,295.20

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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.