Home / 2,115.88-2,921.70-2,007.16

Finding the Fourth Proportional to 2,115.88, 2,921.70 and 2,007.16

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Solution

The fourth proportional to 2,115.88, 2,921.70 and 2,007.16 is: 2,771.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.88 : 2,921.70 = 2,007.16 : x
  2. Step 2: Convert to fraction form
    2,115.88/2,921.70 = 2,007.16/x
  3. Step 3: Cross multiply
    2,115.88x = 2,921.70 × 2,007.16
  4. Step 4: Simplify right side
    2,115.88x = 5,864,319.37
  5. Step 5: Solve for x
    x = 5,864,319.37/2,115.88
  6. Step 6: Final answer
    x = 2,771.57

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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.