Home / 21,149.80-31,724.70-8,002.60

Finding the Fourth Proportional to 21,149.80, 31,724.70 and 8,002.60

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Solution

The fourth proportional to 21,149.80, 31,724.70 and 8,002.60 is: 12,003.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,149.80 : 31,724.70 = 8,002.60 : x
  2. Step 2: Convert to fraction form
    21,149.80/31,724.70 = 8,002.60/x
  3. Step 3: Cross multiply
    21,149.80x = 31,724.70 × 8,002.60
  4. Step 4: Simplify right side
    21,149.80x = 253,880,084.22
  5. Step 5: Solve for x
    x = 253,880,084.22/21,149.80
  6. Step 6: Final answer
    x = 12,003.90

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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.