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Finding the Fourth Proportional to 13,674.78, 18,871.14 and 7,387.14

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Solution

The fourth proportional to 13,674.78, 18,871.14 and 7,387.14 is: 10,194.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,674.78 : 18,871.14 = 7,387.14 : x
  2. Step 2: Convert to fraction form
    13,674.78/18,871.14 = 7,387.14/x
  3. Step 3: Cross multiply
    13,674.78x = 18,871.14 × 7,387.14
  4. Step 4: Simplify right side
    13,674.78x = 139,403,753.14
  5. Step 5: Solve for x
    x = 139,403,753.14/13,674.78
  6. Step 6: Final answer
    x = 10,194.22

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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.