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Finding the Fourth Proportional to 18,456.49, 27,682.56 and 5,130.49

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Solution

The fourth proportional to 18,456.49, 27,682.56 and 5,130.49 is: 7,695.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,456.49 : 27,682.56 = 5,130.49 : x
  2. Step 2: Convert to fraction form
    18,456.49/27,682.56 = 5,130.49/x
  3. Step 3: Cross multiply
    18,456.49x = 27,682.56 × 5,130.49
  4. Step 4: Simplify right side
    18,456.49x = 142,025,097.25
  5. Step 5: Solve for x
    x = 142,025,097.25/18,456.49
  6. Step 6: Final answer
    x = 7,695.13

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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.