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Finding the Fourth Proportional to 18,490.94, 27,726.69 and 15,905.42

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Solution

The fourth proportional to 18,490.94, 27,726.69 and 15,905.42 is: 23,849.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,490.94 : 27,726.69 = 15,905.42 : x
  2. Step 2: Convert to fraction form
    18,490.94/27,726.69 = 15,905.42/x
  3. Step 3: Cross multiply
    18,490.94x = 27,726.69 × 15,905.42
  4. Step 4: Simplify right side
    18,490.94x = 441,004,649.66
  5. Step 5: Solve for x
    x = 441,004,649.66/18,490.94
  6. Step 6: Final answer
    x = 23,849.77

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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.