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Finding the Fourth Proportional to 39,862.19, 55,009.82 and 21,957.19

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Solution

The fourth proportional to 39,862.19, 55,009.82 and 21,957.19 is: 30,300.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,862.19 : 55,009.82 = 21,957.19 : x
  2. Step 2: Convert to fraction form
    39,862.19/55,009.82 = 21,957.19/x
  3. Step 3: Cross multiply
    39,862.19x = 55,009.82 × 21,957.19
  4. Step 4: Simplify right side
    39,862.19x = 1,207,861,051.01
  5. Step 5: Solve for x
    x = 1,207,861,051.01/39,862.19
  6. Step 6: Final answer
    x = 30,300.92

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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.