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Finding the Fourth Proportional to 13,891.78, 19,171.14 and 7,604.20

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Solution

The fourth proportional to 13,891.78, 19,171.14 and 7,604.20 is: 10,494.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,891.78 : 19,171.14 = 7,604.20 : x
  2. Step 2: Convert to fraction form
    13,891.78/19,171.14 = 7,604.20/x
  3. Step 3: Cross multiply
    13,891.78x = 19,171.14 × 7,604.20
  4. Step 4: Simplify right side
    13,891.78x = 145,781,182.79
  5. Step 5: Solve for x
    x = 145,781,182.79/13,891.78
  6. Step 6: Final answer
    x = 10,494.06

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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.