Home / 3,913.40-5,400.49-2,145.00

Finding the Fourth Proportional to 3,913.40, 5,400.49 and 2,145.00

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Solution

The fourth proportional to 3,913.40, 5,400.49 and 2,145.00 is: 2,960.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,913.40 : 5,400.49 = 2,145.00 : x
  2. Step 2: Convert to fraction form
    3,913.40/5,400.49 = 2,145.00/x
  3. Step 3: Cross multiply
    3,913.40x = 5,400.49 × 2,145.00
  4. Step 4: Simplify right side
    3,913.40x = 11,584,013.32
  5. Step 5: Solve for x
    x = 11,584,013.32/3,913.40
  6. Step 6: Final answer
    x = 2,960.09

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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.