Home / 20,966.55-31,455.29-7,819.03

Finding the Fourth Proportional to 20,966.55, 31,455.29 and 7,819.03

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Solution

The fourth proportional to 20,966.55, 31,455.29 and 7,819.03 is: 11,730.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,966.55 : 31,455.29 = 7,819.03 : x
  2. Step 2: Convert to fraction form
    20,966.55/31,455.29 = 7,819.03/x
  3. Step 3: Cross multiply
    20,966.55x = 31,455.29 × 7,819.03
  4. Step 4: Simplify right side
    20,966.55x = 245,949,871.05
  5. Step 5: Solve for x
    x = 245,949,871.05/20,966.55
  6. Step 6: Final answer
    x = 11,730.59

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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.