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Finding the Fourth Proportional to 25,351.94, 34,978.53 and 15,141.77

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Solution

The fourth proportional to 25,351.94, 34,978.53 and 15,141.77 is: 20,891.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,351.94 : 34,978.53 = 15,141.77 : x
  2. Step 2: Convert to fraction form
    25,351.94/34,978.53 = 15,141.77/x
  3. Step 3: Cross multiply
    25,351.94x = 34,978.53 × 15,141.77
  4. Step 4: Simplify right side
    25,351.94x = 529,636,856.20
  5. Step 5: Solve for x
    x = 529,636,856.20/25,351.94
  6. Step 6: Final answer
    x = 20,891.37

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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.