Home / 2,117.87-2,921.68-1,372.07

Finding the Fourth Proportional to 2,117.87, 2,921.68 and 1,372.07

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Solution

The fourth proportional to 2,117.87, 2,921.68 and 1,372.07 is: 1,892.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,117.87 : 2,921.68 = 1,372.07 : x
  2. Step 2: Convert to fraction form
    2,117.87/2,921.68 = 1,372.07/x
  3. Step 3: Cross multiply
    2,117.87x = 2,921.68 × 1,372.07
  4. Step 4: Simplify right side
    2,117.87x = 4,008,749.48
  5. Step 5: Solve for x
    x = 4,008,749.48/2,117.87
  6. Step 6: Final answer
    x = 1,892.82

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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.