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Finding the Fourth Proportional to 39,893.64, 55,050.72 and 21,987.66

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Solution

The fourth proportional to 39,893.64, 55,050.72 and 21,987.66 is: 30,341.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,893.64 : 55,050.72 = 21,987.66 : x
  2. Step 2: Convert to fraction form
    39,893.64/55,050.72 = 21,987.66/x
  3. Step 3: Cross multiply
    39,893.64x = 55,050.72 × 21,987.66
  4. Step 4: Simplify right side
    39,893.64x = 1,210,436,514.12
  5. Step 5: Solve for x
    x = 1,210,436,514.12/39,893.64
  6. Step 6: Final answer
    x = 30,341.59

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.