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Finding the Fourth Proportional to 12,794.39, 17,655.98 and 7,129.11

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Solution

The fourth proportional to 12,794.39, 17,655.98 and 7,129.11 is: 9,838.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,794.39 : 17,655.98 = 7,129.11 : x
  2. Step 2: Convert to fraction form
    12,794.39/17,655.98 = 7,129.11/x
  3. Step 3: Cross multiply
    12,794.39x = 17,655.98 × 7,129.11
  4. Step 4: Simplify right side
    12,794.39x = 125,871,387.93
  5. Step 5: Solve for x
    x = 125,871,387.93/12,794.39
  6. Step 6: Final answer
    x = 9,838.02

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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.