Home / 7,189.20-9,912.54-6,192.78

Finding the Fourth Proportional to 7,189.20, 9,912.54 and 6,192.78

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Solution

The fourth proportional to 7,189.20, 9,912.54 and 6,192.78 is: 8,538.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,189.20 : 9,912.54 = 6,192.78 : x
  2. Step 2: Convert to fraction form
    7,189.20/9,912.54 = 6,192.78/x
  3. Step 3: Cross multiply
    7,189.20x = 9,912.54 × 6,192.78
  4. Step 4: Simplify right side
    7,189.20x = 61,386,179.46
  5. Step 5: Solve for x
    x = 61,386,179.46/7,189.20
  6. Step 6: Final answer
    x = 8,538.67

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1.5x scale

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.