Home / 21,147.80-31,721.70-8,000.60

Finding the Fourth Proportional to 21,147.80, 31,721.70 and 8,000.60

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Solution

The fourth proportional to 21,147.80, 31,721.70 and 8,000.60 is: 12,000.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.80 : 31,721.70 = 8,000.60 : x
  2. Step 2: Convert to fraction form
    21,147.80/31,721.70 = 8,000.60/x
  3. Step 3: Cross multiply
    21,147.80x = 31,721.70 × 8,000.60
  4. Step 4: Simplify right side
    21,147.80x = 253,792,633.02
  5. Step 5: Solve for x
    x = 253,792,633.02/21,147.80
  6. Step 6: Final answer
    x = 12,000.90

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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.