Home / 20,019.80-30,005.40-8,914.70

Finding the Fourth Proportional to 20,019.80, 30,005.40 and 8,914.70

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Solution

The fourth proportional to 20,019.80, 30,005.40 and 8,914.70 is: 13,361.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,019.80 : 30,005.40 = 8,914.70 : x
  2. Step 2: Convert to fraction form
    20,019.80/30,005.40 = 8,914.70/x
  3. Step 3: Cross multiply
    20,019.80x = 30,005.40 × 8,914.70
  4. Step 4: Simplify right side
    20,019.80x = 267,489,139.38
  5. Step 5: Solve for x
    x = 267,489,139.38/20,019.80
  6. Step 6: Final answer
    x = 13,361.23

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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.