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Finding the Fourth Proportional to 18,541.71, 27,775.51 and 11,142.16

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Solution

The fourth proportional to 18,541.71, 27,775.51 and 11,142.16 is: 16,690.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,541.71 : 27,775.51 = 11,142.16 : x
  2. Step 2: Convert to fraction form
    18,541.71/27,775.51 = 11,142.16/x
  3. Step 3: Cross multiply
    18,541.71x = 27,775.51 × 11,142.16
  4. Step 4: Simplify right side
    18,541.71x = 309,479,079.21
  5. Step 5: Solve for x
    x = 309,479,079.21/18,541.71
  6. Step 6: Final answer
    x = 16,690.97

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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.