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Finding the Fourth Proportional to 18,381.29, 27,581.06 and 7,287.74

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Solution

The fourth proportional to 18,381.29, 27,581.06 and 7,287.74 is: 10,935.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,381.29 : 27,581.06 = 7,287.74 : x
  2. Step 2: Convert to fraction form
    18,381.29/27,581.06 = 7,287.74/x
  3. Step 3: Cross multiply
    18,381.29x = 27,581.06 × 7,287.74
  4. Step 4: Simplify right side
    18,381.29x = 201,003,594.20
  5. Step 5: Solve for x
    x = 201,003,594.20/18,381.29
  6. Step 6: Final answer
    x = 10,935.23

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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.