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Finding the Fourth Proportional to 12,708.88, 17,538.45 and 7,119.88

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Solution

The fourth proportional to 12,708.88, 17,538.45 and 7,119.88 is: 9,825.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,708.88 : 17,538.45 = 7,119.88 : x
  2. Step 2: Convert to fraction form
    12,708.88/17,538.45 = 7,119.88/x
  3. Step 3: Cross multiply
    12,708.88x = 17,538.45 × 7,119.88
  4. Step 4: Simplify right side
    12,708.88x = 124,871,659.39
  5. Step 5: Solve for x
    x = 124,871,659.39/12,708.88
  6. Step 6: Final answer
    x = 9,825.54

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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.