Home / 3,125.86-4,312.94-2,131.68

Finding the Fourth Proportional to 3,125.86, 4,312.94 and 2,131.68

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Solution

The fourth proportional to 3,125.86, 4,312.94 and 2,131.68 is: 2,941.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,125.86 : 4,312.94 = 2,131.68 : x
  2. Step 2: Convert to fraction form
    3,125.86/4,312.94 = 2,131.68/x
  3. Step 3: Cross multiply
    3,125.86x = 4,312.94 × 2,131.68
  4. Step 4: Simplify right side
    3,125.86x = 9,193,807.94
  5. Step 5: Solve for x
    x = 9,193,807.94/3,125.86
  6. Step 6: Final answer
    x = 2,941.21

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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.