Home / 5,131.86-7,081.05-2,977.61

Finding the Fourth Proportional to 5,131.86, 7,081.05 and 2,977.61

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Solution

The fourth proportional to 5,131.86, 7,081.05 and 2,977.61 is: 4,108.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,131.86 : 7,081.05 = 2,977.61 : x
  2. Step 2: Convert to fraction form
    5,131.86/7,081.05 = 2,977.61/x
  3. Step 3: Cross multiply
    5,131.86x = 7,081.05 × 2,977.61
  4. Step 4: Simplify right side
    5,131.86x = 21,084,595.76
  5. Step 5: Solve for x
    x = 21,084,595.76/5,131.86
  6. Step 6: Final answer
    x = 4,108.57

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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.