Home / 20,753.45-31,130.09-8,906.21

Finding the Fourth Proportional to 20,753.45, 31,130.09 and 8,906.21

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Solution

The fourth proportional to 20,753.45, 31,130.09 and 8,906.21 is: 13,359.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,753.45 : 31,130.09 = 8,906.21 : x
  2. Step 2: Convert to fraction form
    20,753.45/31,130.09 = 8,906.21/x
  3. Step 3: Cross multiply
    20,753.45x = 31,130.09 × 8,906.21
  4. Step 4: Simplify right side
    20,753.45x = 277,251,185.55
  5. Step 5: Solve for x
    x = 277,251,185.55/20,753.45
  6. Step 6: Final answer
    x = 13,359.28

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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.