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Finding the Fourth Proportional to 25,384.72, 38,112.03 and 12,913.19

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Solution

The fourth proportional to 25,384.72, 38,112.03 and 12,913.19 is: 19,387.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,384.72 : 38,112.03 = 12,913.19 : x
  2. Step 2: Convert to fraction form
    25,384.72/38,112.03 = 12,913.19/x
  3. Step 3: Cross multiply
    25,384.72x = 38,112.03 × 12,913.19
  4. Step 4: Simplify right side
    25,384.72x = 492,147,884.68
  5. Step 5: Solve for x
    x = 492,147,884.68/25,384.72
  6. Step 6: Final answer
    x = 19,387.56

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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.