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Finding the Fourth Proportional to 18,040.79, 27,042.74 and 9,139.63

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Solution

The fourth proportional to 18,040.79, 27,042.74 and 9,139.63 is: 13,700.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,040.79 : 27,042.74 = 9,139.63 : x
  2. Step 2: Convert to fraction form
    18,040.79/27,042.74 = 9,139.63/x
  3. Step 3: Cross multiply
    18,040.79x = 27,042.74 × 9,139.63
  4. Step 4: Simplify right side
    18,040.79x = 247,160,507.70
  5. Step 5: Solve for x
    x = 247,160,507.70/18,040.79
  6. Step 6: Final answer
    x = 13,700.09

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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.