Home / 3,720.92-5,135.13-2,459.78

Finding the Fourth Proportional to 3,720.92, 5,135.13 and 2,459.78

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Solution

The fourth proportional to 3,720.92, 5,135.13 and 2,459.78 is: 3,394.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.92 : 5,135.13 = 2,459.78 : x
  2. Step 2: Convert to fraction form
    3,720.92/5,135.13 = 2,459.78/x
  3. Step 3: Cross multiply
    3,720.92x = 5,135.13 × 2,459.78
  4. Step 4: Simplify right side
    3,720.92x = 12,631,312.54
  5. Step 5: Solve for x
    x = 12,631,312.54/3,720.92
  6. Step 6: Final answer
    x = 3,394.67

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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.