Home / 3,728.10-5,145.54-2,156.70

Finding the Fourth Proportional to 3,728.10, 5,145.54 and 2,156.70

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Solution

The fourth proportional to 3,728.10, 5,145.54 and 2,156.70 is: 2,976.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,728.10 : 5,145.54 = 2,156.70 : x
  2. Step 2: Convert to fraction form
    3,728.10/5,145.54 = 2,156.70/x
  3. Step 3: Cross multiply
    3,728.10x = 5,145.54 × 2,156.70
  4. Step 4: Simplify right side
    3,728.10x = 11,097,386.12
  5. Step 5: Solve for x
    x = 11,097,386.12/3,728.10
  6. Step 6: Final answer
    x = 2,976.69

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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.