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Finding the Fourth Proportional to 18,138.48, 27,208.08 and 7,750.32

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Solution

The fourth proportional to 18,138.48, 27,208.08 and 7,750.32 is: 11,625.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,138.48 : 27,208.08 = 7,750.32 : x
  2. Step 2: Convert to fraction form
    18,138.48/27,208.08 = 7,750.32/x
  3. Step 3: Cross multiply
    18,138.48x = 27,208.08 × 7,750.32
  4. Step 4: Simplify right side
    18,138.48x = 210,871,326.59
  5. Step 5: Solve for x
    x = 210,871,326.59/18,138.48
  6. Step 6: Final answer
    x = 11,625.63

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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.