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Finding the Fourth Proportional to 12,331.78, 17,017.50 and 6,742.78

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Solution

The fourth proportional to 12,331.78, 17,017.50 and 6,742.78 is: 9,304.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,331.78 : 17,017.50 = 6,742.78 : x
  2. Step 2: Convert to fraction form
    12,331.78/17,017.50 = 6,742.78/x
  3. Step 3: Cross multiply
    12,331.78x = 17,017.50 × 6,742.78
  4. Step 4: Simplify right side
    12,331.78x = 114,745,258.65
  5. Step 5: Solve for x
    x = 114,745,258.65/12,331.78
  6. Step 6: Final answer
    x = 9,304.84

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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.