Home / 20,018.80-30,003.90-8,913.70

Finding the Fourth Proportional to 20,018.80, 30,003.90 and 8,913.70

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Solution

The fourth proportional to 20,018.80, 30,003.90 and 8,913.70 is: 13,359.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,018.80 : 30,003.90 = 8,913.70 : x
  2. Step 2: Convert to fraction form
    20,018.80/30,003.90 = 8,913.70/x
  3. Step 3: Cross multiply
    20,018.80x = 30,003.90 × 8,913.70
  4. Step 4: Simplify right side
    20,018.80x = 267,445,763.43
  5. Step 5: Solve for x
    x = 267,445,763.43/20,018.80
  6. Step 6: Final answer
    x = 13,359.73

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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.