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Finding the Fourth Proportional to 9,291.78, 13,935.78 and 2,716.20

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Solution

The fourth proportional to 9,291.78, 13,935.78 and 2,716.20 is: 4,073.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,291.78 : 13,935.78 = 2,716.20 : x
  2. Step 2: Convert to fraction form
    9,291.78/13,935.78 = 2,716.20/x
  3. Step 3: Cross multiply
    9,291.78x = 13,935.78 × 2,716.20
  4. Step 4: Simplify right side
    9,291.78x = 37,852,365.64
  5. Step 5: Solve for x
    x = 37,852,365.64/9,291.78
  6. Step 6: Final answer
    x = 4,073.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.