Home / 3,420.30-4,721.18-2,127.78

Finding the Fourth Proportional to 3,420.30, 4,721.18 and 2,127.78

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Solution

The fourth proportional to 3,420.30, 4,721.18 and 2,127.78 is: 2,937.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.30 : 4,721.18 = 2,127.78 : x
  2. Step 2: Convert to fraction form
    3,420.30/4,721.18 = 2,127.78/x
  3. Step 3: Cross multiply
    3,420.30x = 4,721.18 × 2,127.78
  4. Step 4: Simplify right side
    3,420.30x = 10,045,621.74
  5. Step 5: Solve for x
    x = 10,045,621.74/3,420.30
  6. Step 6: Final answer
    x = 2,937.06

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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.