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Finding the Fourth Proportional to 39,940.72, 59,911.08 and 12,238.72

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Solution

The fourth proportional to 39,940.72, 59,911.08 and 12,238.72 is: 18,358.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,940.72 : 59,911.08 = 12,238.72 : x
  2. Step 2: Convert to fraction form
    39,940.72/59,911.08 = 12,238.72/x
  3. Step 3: Cross multiply
    39,940.72x = 59,911.08 × 12,238.72
  4. Step 4: Simplify right side
    39,940.72x = 733,234,933.02
  5. Step 5: Solve for x
    x = 733,234,933.02/39,940.72
  6. Step 6: Final answer
    x = 18,358.08

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1.5x scale

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.