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Finding the Fourth Proportional to 39,238.90, 54,149.76 and 21,333.89

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Solution

The fourth proportional to 39,238.90, 54,149.76 and 21,333.89 is: 29,440.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,238.90 : 54,149.76 = 21,333.89 : x
  2. Step 2: Convert to fraction form
    39,238.90/54,149.76 = 21,333.89/x
  3. Step 3: Cross multiply
    39,238.90x = 54,149.76 × 21,333.89
  4. Step 4: Simplify right side
    39,238.90x = 1,155,225,158.74
  5. Step 5: Solve for x
    x = 1,155,225,158.74/39,238.90
  6. Step 6: Final answer
    x = 29,440.82

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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.