Home / 3,911.59-5,396.91-2,515.15

Finding the Fourth Proportional to 3,911.59, 5,396.91 and 2,515.15

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Solution

The fourth proportional to 3,911.59, 5,396.91 and 2,515.15 is: 3,470.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.59 : 5,396.91 = 2,515.15 : x
  2. Step 2: Convert to fraction form
    3,911.59/5,396.91 = 2,515.15/x
  3. Step 3: Cross multiply
    3,911.59x = 5,396.91 × 2,515.15
  4. Step 4: Simplify right side
    3,911.59x = 13,574,038.19
  5. Step 5: Solve for x
    x = 13,574,038.19/3,911.59
  6. Step 6: Final answer
    x = 3,470.21

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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.