Home / 5,170.50-7,139.88-3,285.36

Finding the Fourth Proportional to 5,170.50, 7,139.88 and 3,285.36

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Solution

The fourth proportional to 5,170.50, 7,139.88 and 3,285.36 is: 4,536.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,170.50 : 7,139.88 = 3,285.36 : x
  2. Step 2: Convert to fraction form
    5,170.50/7,139.88 = 3,285.36/x
  3. Step 3: Cross multiply
    5,170.50x = 7,139.88 × 3,285.36
  4. Step 4: Simplify right side
    5,170.50x = 23,457,076.16
  5. Step 5: Solve for x
    x = 23,457,076.16/5,170.50
  6. Step 6: Final answer
    x = 4,536.71

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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.