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Finding the Fourth Proportional to 39,905.60, 55,070.08 and 22,001.24

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Solution

The fourth proportional to 39,905.60, 55,070.08 and 22,001.24 is: 30,361.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,905.60 : 55,070.08 = 22,001.24 : x
  2. Step 2: Convert to fraction form
    39,905.60/55,070.08 = 22,001.24/x
  3. Step 3: Cross multiply
    39,905.60x = 55,070.08 × 22,001.24
  4. Step 4: Simplify right side
    39,905.60x = 1,211,610,129.57
  5. Step 5: Solve for x
    x = 1,211,610,129.57/39,905.60
  6. Step 6: Final answer
    x = 30,361.91

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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.