Home / 3,913.50-5,400.51-2,145.18

Finding the Fourth Proportional to 3,913.50, 5,400.51 and 2,145.18

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Solution

The fourth proportional to 3,913.50, 5,400.51 and 2,145.18 is: 2,960.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,913.50 : 5,400.51 = 2,145.18 : x
  2. Step 2: Convert to fraction form
    3,913.50/5,400.51 = 2,145.18/x
  3. Step 3: Cross multiply
    3,913.50x = 5,400.51 × 2,145.18
  4. Step 4: Simplify right side
    3,913.50x = 11,585,066.04
  5. Step 5: Solve for x
    x = 11,585,066.04/3,913.50
  6. Step 6: Final answer
    x = 2,960.28

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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.