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Finding the Fourth Proportional to 18,410.79, 27,616.34 and 7,875.38

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Solution

The fourth proportional to 18,410.79, 27,616.34 and 7,875.38 is: 11,813.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,410.79 : 27,616.34 = 7,875.38 : x
  2. Step 2: Convert to fraction form
    18,410.79/27,616.34 = 7,875.38/x
  3. Step 3: Cross multiply
    18,410.79x = 27,616.34 × 7,875.38
  4. Step 4: Simplify right side
    18,410.79x = 217,489,105.10
  5. Step 5: Solve for x
    x = 217,489,105.10/18,410.79
  6. Step 6: Final answer
    x = 11,813.13

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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.