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Finding the Fourth Proportional to 39,240, 58,885.92 and 18,465.12

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Solution

The fourth proportional to 39,240, 58,885.92 and 18,465.12 is: 27,709.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,240 : 58,885.92 = 18,465.12 : x
  2. Step 2: Convert to fraction form
    39,240/58,885.92 = 18,465.12/x
  3. Step 3: Cross multiply
    39,240x = 58,885.92 × 18,465.12
  4. Step 4: Simplify right side
    39,240x = 1,087,335,579.11
  5. Step 5: Solve for x
    x = 1,087,335,579.11/39,240
  6. Step 6: Final answer
    x = 27,709.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.