Home / 3,131.88-4,320.80-2,070.15

Finding the Fourth Proportional to 3,131.88, 4,320.80 and 2,070.15

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Solution

The fourth proportional to 3,131.88, 4,320.80 and 2,070.15 is: 2,856.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.88 : 4,320.80 = 2,070.15 : x
  2. Step 2: Convert to fraction form
    3,131.88/4,320.80 = 2,070.15/x
  3. Step 3: Cross multiply
    3,131.88x = 4,320.80 × 2,070.15
  4. Step 4: Simplify right side
    3,131.88x = 8,944,672.17
  5. Step 5: Solve for x
    x = 8,944,672.17/3,131.88
  6. Step 6: Final answer
    x = 2,856.01

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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.