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Finding the Fourth Proportional to 13,491.65, 18,617.79 and 7,442.94

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Solution

The fourth proportional to 13,491.65, 18,617.79 and 7,442.94 is: 10,270.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,491.65 : 18,617.79 = 7,442.94 : x
  2. Step 2: Convert to fraction form
    13,491.65/18,617.79 = 7,442.94/x
  3. Step 3: Cross multiply
    13,491.65x = 18,617.79 × 7,442.94
  4. Step 4: Simplify right side
    13,491.65x = 138,571,093.90
  5. Step 5: Solve for x
    x = 138,571,093.90/13,491.65
  6. Step 6: Final answer
    x = 10,270.88

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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.