Home / 7,820.60-11,729.46-2,121.67

Finding the Fourth Proportional to 7,820.60, 11,729.46 and 2,121.67

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Solution

The fourth proportional to 7,820.60, 11,729.46 and 2,121.67 is: 3,182.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,820.60 : 11,729.46 = 2,121.67 : x
  2. Step 2: Convert to fraction form
    7,820.60/11,729.46 = 2,121.67/x
  3. Step 3: Cross multiply
    7,820.60x = 11,729.46 × 2,121.67
  4. Step 4: Simplify right side
    7,820.60x = 24,886,043.40
  5. Step 5: Solve for x
    x = 24,886,043.40/7,820.60
  6. Step 6: Final answer
    x = 3,182.11

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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.