Home / 20,020.80-30,006.90-8,915.70

Finding the Fourth Proportional to 20,020.80, 30,006.90 and 8,915.70

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Solution

The fourth proportional to 20,020.80, 30,006.90 and 8,915.70 is: 13,362.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,020.80 : 30,006.90 = 8,915.70 : x
  2. Step 2: Convert to fraction form
    20,020.80/30,006.90 = 8,915.70/x
  3. Step 3: Cross multiply
    20,020.80x = 30,006.90 × 8,915.70
  4. Step 4: Simplify right side
    20,020.80x = 267,532,518.33
  5. Step 5: Solve for x
    x = 267,532,518.33/20,020.80
  6. Step 6: Final answer
    x = 13,362.73

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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.