Home / 7,920.15-11,880.12-3,242.67

Finding the Fourth Proportional to 7,920.15, 11,880.12 and 3,242.67

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Solution

The fourth proportional to 7,920.15, 11,880.12 and 3,242.67 is: 4,863.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.15 : 11,880.12 = 3,242.67 : x
  2. Step 2: Convert to fraction form
    7,920.15/11,880.12 = 3,242.67/x
  3. Step 3: Cross multiply
    7,920.15x = 11,880.12 × 3,242.67
  4. Step 4: Simplify right side
    7,920.15x = 38,523,308.72
  5. Step 5: Solve for x
    x = 38,523,308.72/7,920.15
  6. Step 6: Final answer
    x = 4,863.96

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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.