Home / 7,814.28-11,721.39-1,970.88

Finding the Fourth Proportional to 7,814.28, 11,721.39 and 1,970.88

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Solution

The fourth proportional to 7,814.28, 11,721.39 and 1,970.88 is: 2,956.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,814.28 : 11,721.39 = 1,970.88 : x
  2. Step 2: Convert to fraction form
    7,814.28/11,721.39 = 1,970.88/x
  3. Step 3: Cross multiply
    7,814.28x = 11,721.39 × 1,970.88
  4. Step 4: Simplify right side
    7,814.28x = 23,101,453.12
  5. Step 5: Solve for x
    x = 23,101,453.12/7,814.28
  6. Step 6: Final answer
    x = 2,956.31

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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.