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Finding the Fourth Proportional to 38,447.01, 57,679.83 and 18,721.08

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Solution

The fourth proportional to 38,447.01, 57,679.83 and 18,721.08 is: 28,086.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,447.01 : 57,679.83 = 18,721.08 : x
  2. Step 2: Convert to fraction form
    38,447.01/57,679.83 = 18,721.08/x
  3. Step 3: Cross multiply
    38,447.01x = 57,679.83 × 18,721.08
  4. Step 4: Simplify right side
    38,447.01x = 1,079,828,711.82
  5. Step 5: Solve for x
    x = 1,079,828,711.82/38,447.01
  6. Step 6: Final answer
    x = 28,086.16

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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.