Home / 3,911.63-5,397.20-2,318.78

Finding the Fourth Proportional to 3,911.63, 5,397.20 and 2,318.78

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Solution

The fourth proportional to 3,911.63, 5,397.20 and 2,318.78 is: 3,199.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.63 : 5,397.20 = 2,318.78 : x
  2. Step 2: Convert to fraction form
    3,911.63/5,397.20 = 2,318.78/x
  3. Step 3: Cross multiply
    3,911.63x = 5,397.20 × 2,318.78
  4. Step 4: Simplify right side
    3,911.63x = 12,514,880.84
  5. Step 5: Solve for x
    x = 12,514,880.84/3,911.63
  6. Step 6: Final answer
    x = 3,199.41

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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.