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Finding the Fourth Proportional to 18,776.71, 25,918.38 and 11,612.11

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Solution

The fourth proportional to 18,776.71, 25,918.38 and 11,612.11 is: 16,028.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,776.71 : 25,918.38 = 11,612.11 : x
  2. Step 2: Convert to fraction form
    18,776.71/25,918.38 = 11,612.11/x
  3. Step 3: Cross multiply
    18,776.71x = 25,918.38 × 11,612.11
  4. Step 4: Simplify right side
    18,776.71x = 300,967,063.38
  5. Step 5: Solve for x
    x = 300,967,063.38/18,776.71
  6. Step 6: Final answer
    x = 16,028.74

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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.