Home / 3,917.16-5,407.20-2,520

Finding the Fourth Proportional to 3,917.16, 5,407.20 and 2,520

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Solution

The fourth proportional to 3,917.16, 5,407.20 and 2,520 is: 3,478.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.16 : 5,407.20 = 2,520 : x
  2. Step 2: Convert to fraction form
    3,917.16/5,407.20 = 2,520/x
  3. Step 3: Cross multiply
    3,917.16x = 5,407.20 × 2,520
  4. Step 4: Simplify right side
    3,917.16x = 13,626,144
  5. Step 5: Solve for x
    x = 13,626,144/3,917.16
  6. Step 6: Final answer
    x = 3,478.58

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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.