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Finding the Fourth Proportional to 25,978.89, 35,845.74 and 15,369.20

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Solution

The fourth proportional to 25,978.89, 35,845.74 and 15,369.20 is: 21,206.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,978.89 : 35,845.74 = 15,369.20 : x
  2. Step 2: Convert to fraction form
    25,978.89/35,845.74 = 15,369.20/x
  3. Step 3: Cross multiply
    25,978.89x = 35,845.74 × 15,369.20
  4. Step 4: Simplify right side
    25,978.89x = 550,920,167.98
  5. Step 5: Solve for x
    x = 550,920,167.98/25,978.89
  6. Step 6: Final answer
    x = 21,206.46

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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.