Home / 20,639.80-30,959.31-5,057.56

Finding the Fourth Proportional to 20,639.80, 30,959.31 and 5,057.56

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Solution

The fourth proportional to 20,639.80, 30,959.31 and 5,057.56 is: 7,586.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.80 : 30,959.31 = 5,057.56 : x
  2. Step 2: Convert to fraction form
    20,639.80/30,959.31 = 5,057.56/x
  3. Step 3: Cross multiply
    20,639.80x = 30,959.31 × 5,057.56
  4. Step 4: Simplify right side
    20,639.80x = 156,578,567.88
  5. Step 5: Solve for x
    x = 156,578,567.88/20,639.80
  6. Step 6: Final answer
    x = 7,586.24

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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.