Home / 20,865.91-31,300.00-5,283.67

Finding the Fourth Proportional to 20,865.91, 31,300.00 and 5,283.67

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Solution

The fourth proportional to 20,865.91, 31,300.00 and 5,283.67 is: 7,925.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,865.91 : 31,300.00 = 5,283.67 : x
  2. Step 2: Convert to fraction form
    20,865.91/31,300.00 = 5,283.67/x
  3. Step 3: Cross multiply
    20,865.91x = 31,300.00 × 5,283.67
  4. Step 4: Simplify right side
    20,865.91x = 165,378,799.35
  5. Step 5: Solve for x
    x = 165,378,799.35/20,865.91
  6. Step 6: Final answer
    x = 7,925.79

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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.