Home / 20,619.80-30,929.68-7,472.15

Finding the Fourth Proportional to 20,619.80, 30,929.68 and 7,472.15

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Solution

The fourth proportional to 20,619.80, 30,929.68 and 7,472.15 is: 11,208.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.80 : 30,929.68 = 7,472.15 : x
  2. Step 2: Convert to fraction form
    20,619.80/30,929.68 = 7,472.15/x
  3. Step 3: Cross multiply
    20,619.80x = 30,929.68 × 7,472.15
  4. Step 4: Simplify right side
    20,619.80x = 231,111,016.40
  5. Step 5: Solve for x
    x = 231,111,016.40/20,619.80
  6. Step 6: Final answer
    x = 11,208.21

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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.