Home / 4,000.78-5,518.20-2,672.17

Finding the Fourth Proportional to 4,000.78, 5,518.20 and 2,672.17

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Solution

The fourth proportional to 4,000.78, 5,518.20 and 2,672.17 is: 3,685.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,000.78 : 5,518.20 = 2,672.17 : x
  2. Step 2: Convert to fraction form
    4,000.78/5,518.20 = 2,672.17/x
  3. Step 3: Cross multiply
    4,000.78x = 5,518.20 × 2,672.17
  4. Step 4: Simplify right side
    4,000.78x = 14,745,568.49
  5. Step 5: Solve for x
    x = 14,745,568.49/4,000.78
  6. Step 6: Final answer
    x = 3,685.67

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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.