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Finding the Fourth Proportional to 39,398.86, 54,371.80 and 21,494.86

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Solution

The fourth proportional to 39,398.86, 54,371.80 and 21,494.86 is: 29,663.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,398.86 : 54,371.80 = 21,494.86 : x
  2. Step 2: Convert to fraction form
    39,398.86/54,371.80 = 21,494.86/x
  3. Step 3: Cross multiply
    39,398.86x = 54,371.80 × 21,494.86
  4. Step 4: Simplify right side
    39,398.86x = 1,168,714,228.95
  5. Step 5: Solve for x
    x = 1,168,714,228.95/39,398.86
  6. Step 6: Final answer
    x = 29,663.66

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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.