Home / 2,121.10-3,181.65-2,007.70

Finding the Fourth Proportional to 2,121.10, 3,181.65 and 2,007.70

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Solution

The fourth proportional to 2,121.10, 3,181.65 and 2,007.70 is: 3,011.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.10 : 3,181.65 = 2,007.70 : x
  2. Step 2: Convert to fraction form
    2,121.10/3,181.65 = 2,007.70/x
  3. Step 3: Cross multiply
    2,121.10x = 3,181.65 × 2,007.70
  4. Step 4: Simplify right side
    2,121.10x = 6,387,798.71
  5. Step 5: Solve for x
    x = 6,387,798.71/2,121.10
  6. Step 6: Final answer
    x = 3,011.55

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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.