Home / 2,129.39-2,937.38-1,991.06

Finding the Fourth Proportional to 2,129.39, 2,937.38 and 1,991.06

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Solution

The fourth proportional to 2,129.39, 2,937.38 and 1,991.06 is: 2,746.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.39 : 2,937.38 = 1,991.06 : x
  2. Step 2: Convert to fraction form
    2,129.39/2,937.38 = 1,991.06/x
  3. Step 3: Cross multiply
    2,129.39x = 2,937.38 × 1,991.06
  4. Step 4: Simplify right side
    2,129.39x = 5,848,475.18
  5. Step 5: Solve for x
    x = 5,848,475.18/2,129.39
  6. Step 6: Final answer
    x = 2,746.56

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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.