Home / 3,125.89-4,312.90-2,118.10

Finding the Fourth Proportional to 3,125.89, 4,312.90 and 2,118.10

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Solution

The fourth proportional to 3,125.89, 4,312.90 and 2,118.10 is: 2,922.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,125.89 : 4,312.90 = 2,118.10 : x
  2. Step 2: Convert to fraction form
    3,125.89/4,312.90 = 2,118.10/x
  3. Step 3: Cross multiply
    3,125.89x = 4,312.90 × 2,118.10
  4. Step 4: Simplify right side
    3,125.89x = 9,135,141.53
  5. Step 5: Solve for x
    x = 9,135,141.53/3,125.89
  6. Step 6: Final answer
    x = 2,922.41

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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.