Home / 20,738.94-31,108.53-5,156.57

Finding the Fourth Proportional to 20,738.94, 31,108.53 and 5,156.57

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Solution

The fourth proportional to 20,738.94, 31,108.53 and 5,156.57 is: 7,734.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.94 : 31,108.53 = 5,156.57 : x
  2. Step 2: Convert to fraction form
    20,738.94/31,108.53 = 5,156.57/x
  3. Step 3: Cross multiply
    20,738.94x = 31,108.53 × 5,156.57
  4. Step 4: Simplify right side
    20,738.94x = 160,413,157.00
  5. Step 5: Solve for x
    x = 160,413,157.00/20,738.94
  6. Step 6: Final answer
    x = 7,734.88

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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.