Home / 3,147.30-4,343.40-1,821.11

Finding the Fourth Proportional to 3,147.30, 4,343.40 and 1,821.11

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Solution

The fourth proportional to 3,147.30, 4,343.40 and 1,821.11 is: 2,513.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,147.30 : 4,343.40 = 1,821.11 : x
  2. Step 2: Convert to fraction form
    3,147.30/4,343.40 = 1,821.11/x
  3. Step 3: Cross multiply
    3,147.30x = 4,343.40 × 1,821.11
  4. Step 4: Simplify right side
    3,147.30x = 7,909,787.46
  5. Step 5: Solve for x
    x = 7,909,787.46/3,147.30
  6. Step 6: Final answer
    x = 2,513.20

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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.