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Finding the Fourth Proportional to 9,906.66, 13,671.09 and 5,430.54

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Solution

The fourth proportional to 9,906.66, 13,671.09 and 5,430.54 is: 7,494.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,906.66 : 13,671.09 = 5,430.54 : x
  2. Step 2: Convert to fraction form
    9,906.66/13,671.09 = 5,430.54/x
  3. Step 3: Cross multiply
    9,906.66x = 13,671.09 × 5,430.54
  4. Step 4: Simplify right side
    9,906.66x = 74,241,401.09
  5. Step 5: Solve for x
    x = 74,241,401.09/9,906.66
  6. Step 6: Final answer
    x = 7,494.09

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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.