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Finding the Fourth Proportional to 39,230, 54,137.59 and 21,325

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Solution

The fourth proportional to 39,230, 54,137.59 and 21,325 is: 29,428.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,230 : 54,137.59 = 21,325 : x
  2. Step 2: Convert to fraction form
    39,230/54,137.59 = 21,325/x
  3. Step 3: Cross multiply
    39,230x = 54,137.59 × 21,325
  4. Step 4: Simplify right side
    39,230x = 1,154,484,106.75
  5. Step 5: Solve for x
    x = 1,154,484,106.75/39,230
  6. Step 6: Final answer
    x = 29,428.60

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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.