Home / 20,266.80-30,400.08-7,122.90

Finding the Fourth Proportional to 20,266.80, 30,400.08 and 7,122.90

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Solution

The fourth proportional to 20,266.80, 30,400.08 and 7,122.90 is: 10,684.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,266.80 : 30,400.08 = 7,122.90 : x
  2. Step 2: Convert to fraction form
    20,266.80/30,400.08 = 7,122.90/x
  3. Step 3: Cross multiply
    20,266.80x = 30,400.08 × 7,122.90
  4. Step 4: Simplify right side
    20,266.80x = 216,536,729.83
  5. Step 5: Solve for x
    x = 216,536,729.83/20,266.80
  6. Step 6: Final answer
    x = 10,684.31

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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.