Home / 2,354.40-3,515.20-2,121.12

Finding the Fourth Proportional to 2,354.40, 3,515.20 and 2,121.12

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Solution

The fourth proportional to 2,354.40, 3,515.20 and 2,121.12 is: 3,166.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,354.40 : 3,515.20 = 2,121.12 : x
  2. Step 2: Convert to fraction form
    2,354.40/3,515.20 = 2,121.12/x
  3. Step 3: Cross multiply
    2,354.40x = 3,515.20 × 2,121.12
  4. Step 4: Simplify right side
    2,354.40x = 7,456,155.72
  5. Step 5: Solve for x
    x = 7,456,155.72/2,354.40
  6. Step 6: Final answer
    x = 3,166.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.