Home / 5,211.48-7,190.78-3,115.16

Finding the Fourth Proportional to 5,211.48, 7,190.78 and 3,115.16

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Solution

The fourth proportional to 5,211.48, 7,190.78 and 3,115.16 is: 4,298.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,211.48 : 7,190.78 = 3,115.16 : x
  2. Step 2: Convert to fraction form
    5,211.48/7,190.78 = 3,115.16/x
  3. Step 3: Cross multiply
    5,211.48x = 7,190.78 × 3,115.16
  4. Step 4: Simplify right side
    5,211.48x = 22,400,430.22
  5. Step 5: Solve for x
    x = 22,400,430.22/5,211.48
  6. Step 6: Final answer
    x = 4,298.29

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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.