Home / 20,280.60-30,399.30-7,795.80

Finding the Fourth Proportional to 20,280.60, 30,399.30 and 7,795.80

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Solution

The fourth proportional to 20,280.60, 30,399.30 and 7,795.80 is: 11,685.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.60 : 30,399.30 = 7,795.80 : x
  2. Step 2: Convert to fraction form
    20,280.60/30,399.30 = 7,795.80/x
  3. Step 3: Cross multiply
    20,280.60x = 30,399.30 × 7,795.80
  4. Step 4: Simplify right side
    20,280.60x = 236,986,862.94
  5. Step 5: Solve for x
    x = 236,986,862.94/20,280.60
  6. Step 6: Final answer
    x = 11,685.40

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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.