Home / 20,120.19-30,180.29-6,972.57

Finding the Fourth Proportional to 20,120.19, 30,180.29 and 6,972.57

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Solution

The fourth proportional to 20,120.19, 30,180.29 and 6,972.57 is: 10,458.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.19 : 30,180.29 = 6,972.57 : x
  2. Step 2: Convert to fraction form
    20,120.19/30,180.29 = 6,972.57/x
  3. Step 3: Cross multiply
    20,120.19x = 30,180.29 × 6,972.57
  4. Step 4: Simplify right side
    20,120.19x = 210,434,184.65
  5. Step 5: Solve for x
    x = 210,434,184.65/20,120.19
  6. Step 6: Final answer
    x = 10,458.86

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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.