Home / 20,819.38-31,228.53-9,719.95

Finding the Fourth Proportional to 20,819.38, 31,228.53 and 9,719.95

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Solution

The fourth proportional to 20,819.38, 31,228.53 and 9,719.95 is: 14,579.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.38 : 31,228.53 = 9,719.95 : x
  2. Step 2: Convert to fraction form
    20,819.38/31,228.53 = 9,719.95/x
  3. Step 3: Cross multiply
    20,819.38x = 31,228.53 × 9,719.95
  4. Step 4: Simplify right side
    20,819.38x = 303,539,750.17
  5. Step 5: Solve for x
    x = 303,539,750.17/20,819.38
  6. Step 6: Final answer
    x = 14,579.67

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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.