Home / 20,619.90-30,929.76-6,768.90

Finding the Fourth Proportional to 20,619.90, 30,929.76 and 6,768.90

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Solution

The fourth proportional to 20,619.90, 30,929.76 and 6,768.90 is: 10,153.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.90 : 30,929.76 = 6,768.90 : x
  2. Step 2: Convert to fraction form
    20,619.90/30,929.76 = 6,768.90/x
  3. Step 3: Cross multiply
    20,619.90x = 30,929.76 × 6,768.90
  4. Step 4: Simplify right side
    20,619.90x = 209,360,452.46
  5. Step 5: Solve for x
    x = 209,360,452.46/20,619.90
  6. Step 6: Final answer
    x = 10,153.32

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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.