Home / 2,812.35-3,882.70-1,929.45

Finding the Fourth Proportional to 2,812.35, 3,882.70 and 1,929.45

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Solution

The fourth proportional to 2,812.35, 3,882.70 and 1,929.45 is: 2,663.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.35 : 3,882.70 = 1,929.45 : x
  2. Step 2: Convert to fraction form
    2,812.35/3,882.70 = 1,929.45/x
  3. Step 3: Cross multiply
    2,812.35x = 3,882.70 × 1,929.45
  4. Step 4: Simplify right side
    2,812.35x = 7,491,456.13
  5. Step 5: Solve for x
    x = 7,491,456.13/2,812.35
  6. Step 6: Final answer
    x = 2,663.77

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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.