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Finding the Fourth Proportional to 9,884.70, 13,640.77 and 5,408.40

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Solution

The fourth proportional to 9,884.70, 13,640.77 and 5,408.40 is: 7,463.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,884.70 : 13,640.77 = 5,408.40 : x
  2. Step 2: Convert to fraction form
    9,884.70/13,640.77 = 5,408.40/x
  3. Step 3: Cross multiply
    9,884.70x = 13,640.77 × 5,408.40
  4. Step 4: Simplify right side
    9,884.70x = 73,774,740.47
  5. Step 5: Solve for x
    x = 73,774,740.47/9,884.70
  6. Step 6: Final answer
    x = 7,463.53

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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.