Home / 18,221.66-25,138.59-11,135.78

Finding the Fourth Proportional to 18,221.66, 25,138.59 and 11,135.78

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Solution

The fourth proportional to 18,221.66, 25,138.59 and 11,135.78 is: 15,362.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,221.66 : 25,138.59 = 11,135.78 : x
  2. Step 2: Convert to fraction form
    18,221.66/25,138.59 = 11,135.78/x
  3. Step 3: Cross multiply
    18,221.66x = 25,138.59 × 11,135.78
  4. Step 4: Simplify right side
    18,221.66x = 279,937,807.75
  5. Step 5: Solve for x
    x = 279,937,807.75/18,221.66
  6. Step 6: Final answer
    x = 15,362.91

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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.