Home / 13,819.68-20,699.28-7,961.76

Finding the Fourth Proportional to 13,819.68, 20,699.28 and 7,961.76

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Solution

The fourth proportional to 13,819.68, 20,699.28 and 7,961.76 is: 11,925.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,819.68 : 20,699.28 = 7,961.76 : x
  2. Step 2: Convert to fraction form
    13,819.68/20,699.28 = 7,961.76/x
  3. Step 3: Cross multiply
    13,819.68x = 20,699.28 × 7,961.76
  4. Step 4: Simplify right side
    13,819.68x = 164,802,699.53
  5. Step 5: Solve for x
    x = 164,802,699.53/13,819.68
  6. Step 6: Final answer
    x = 11,925.22

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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.