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Finding the Fourth Proportional to 5,265.80, 7,885.90 and 3,960.20

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Solution

The fourth proportional to 5,265.80, 7,885.90 and 3,960.20 is: 5,930.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,265.80 : 7,885.90 = 3,960.20 : x
  2. Step 2: Convert to fraction form
    5,265.80/7,885.90 = 3,960.20/x
  3. Step 3: Cross multiply
    5,265.80x = 7,885.90 × 3,960.20
  4. Step 4: Simplify right side
    5,265.80x = 31,229,741.18
  5. Step 5: Solve for x
    x = 31,229,741.18/5,265.80
  6. Step 6: Final answer
    x = 5,930.67

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1.5x scale

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.