Home / 25,819.89-35,642.48-21,861.69

Finding the Fourth Proportional to 25,819.89, 35,642.48 and 21,861.69

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Solution

The fourth proportional to 25,819.89, 35,642.48 and 21,861.69 is: 30,178.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,819.89 : 35,642.48 = 21,861.69 : x
  2. Step 2: Convert to fraction form
    25,819.89/35,642.48 = 21,861.69/x
  3. Step 3: Cross multiply
    25,819.89x = 35,642.48 × 21,861.69
  4. Step 4: Simplify right side
    25,819.89x = 779,204,739.28
  5. Step 5: Solve for x
    x = 779,204,739.28/25,819.89
  6. Step 6: Final answer
    x = 30,178.47

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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.