Home / 2,086.86-3,130.43-1,981.76

Finding the Fourth Proportional to 2,086.86, 3,130.43 and 1,981.76

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Solution

The fourth proportional to 2,086.86, 3,130.43 and 1,981.76 is: 2,972.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,086.86 : 3,130.43 = 1,981.76 : x
  2. Step 2: Convert to fraction form
    2,086.86/3,130.43 = 1,981.76/x
  3. Step 3: Cross multiply
    2,086.86x = 3,130.43 × 1,981.76
  4. Step 4: Simplify right side
    2,086.86x = 6,203,750.26
  5. Step 5: Solve for x
    x = 6,203,750.26/2,086.86
  6. Step 6: Final answer
    x = 2,972.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.