Home / 5,105.43-7,659.27-1,985.49

Finding the Fourth Proportional to 5,105.43, 7,659.27 and 1,985.49

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Solution

The fourth proportional to 5,105.43, 7,659.27 and 1,985.49 is: 2,978.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,105.43 : 7,659.27 = 1,985.49 : x
  2. Step 2: Convert to fraction form
    5,105.43/7,659.27 = 1,985.49/x
  3. Step 3: Cross multiply
    5,105.43x = 7,659.27 × 1,985.49
  4. Step 4: Simplify right side
    5,105.43x = 15,207,403.99
  5. Step 5: Solve for x
    x = 15,207,403.99/5,105.43
  6. Step 6: Final answer
    x = 2,978.67

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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.