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Finding the Fourth Proportional to 18,156.78, 27,235.17 and 5,012.94

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Solution

The fourth proportional to 18,156.78, 27,235.17 and 5,012.94 is: 7,519.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,156.78 : 27,235.17 = 5,012.94 : x
  2. Step 2: Convert to fraction form
    18,156.78/27,235.17 = 5,012.94/x
  3. Step 3: Cross multiply
    18,156.78x = 27,235.17 × 5,012.94
  4. Step 4: Simplify right side
    18,156.78x = 136,528,273.10
  5. Step 5: Solve for x
    x = 136,528,273.10/18,156.78
  6. Step 6: Final answer
    x = 7,519.41

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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.