Home / 20,103.80-30,158.40-6,960.20

Finding the Fourth Proportional to 20,103.80, 30,158.40 and 6,960.20

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Solution

The fourth proportional to 20,103.80, 30,158.40 and 6,960.20 is: 10,441.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,103.80 : 30,158.40 = 6,960.20 : x
  2. Step 2: Convert to fraction form
    20,103.80/30,158.40 = 6,960.20/x
  3. Step 3: Cross multiply
    20,103.80x = 30,158.40 × 6,960.20
  4. Step 4: Simplify right side
    20,103.80x = 209,908,495.68
  5. Step 5: Solve for x
    x = 209,908,495.68/20,103.80
  6. Step 6: Final answer
    x = 10,441.23

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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.