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Finding the Fourth Proportional to 9,884.40, 13,640.79 and 5,408.28

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Solution

The fourth proportional to 9,884.40, 13,640.79 and 5,408.28 is: 7,463.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,884.40 : 13,640.79 = 5,408.28 : x
  2. Step 2: Convert to fraction form
    9,884.40/13,640.79 = 5,408.28/x
  3. Step 3: Cross multiply
    9,884.40x = 13,640.79 × 5,408.28
  4. Step 4: Simplify right side
    9,884.40x = 73,773,211.74
  5. Step 5: Solve for x
    x = 73,773,211.74/9,884.40
  6. Step 6: Final answer
    x = 7,463.60

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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.