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Finding the Fourth Proportional to 18,297.78, 25,252.20 and 11,130.51

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Solution

The fourth proportional to 18,297.78, 25,252.20 and 11,130.51 is: 15,360.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,297.78 : 25,252.20 = 11,130.51 : x
  2. Step 2: Convert to fraction form
    18,297.78/25,252.20 = 11,130.51/x
  3. Step 3: Cross multiply
    18,297.78x = 25,252.20 × 11,130.51
  4. Step 4: Simplify right side
    18,297.78x = 281,069,864.62
  5. Step 5: Solve for x
    x = 281,069,864.62/18,297.78
  6. Step 6: Final answer
    x = 15,360.87

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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.