Home / 2,628.30-3,937.65-2,138.70

Finding the Fourth Proportional to 2,628.30, 3,937.65 and 2,138.70

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Solution

The fourth proportional to 2,628.30, 3,937.65 and 2,138.70 is: 3,204.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,628.30 : 3,937.65 = 2,138.70 : x
  2. Step 2: Convert to fraction form
    2,628.30/3,937.65 = 2,138.70/x
  3. Step 3: Cross multiply
    2,628.30x = 3,937.65 × 2,138.70
  4. Step 4: Simplify right side
    2,628.30x = 8,421,452.06
  5. Step 5: Solve for x
    x = 8,421,452.06/2,628.30
  6. Step 6: Final answer
    x = 3,204.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.