Home / 20,739.32-31,108.97-5,156.95

Finding the Fourth Proportional to 20,739.32, 31,108.97 and 5,156.95

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Solution

The fourth proportional to 20,739.32, 31,108.97 and 5,156.95 is: 7,735.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.32 : 31,108.97 = 5,156.95 : x
  2. Step 2: Convert to fraction form
    20,739.32/31,108.97 = 5,156.95/x
  3. Step 3: Cross multiply
    20,739.32x = 31,108.97 × 5,156.95
  4. Step 4: Simplify right side
    20,739.32x = 160,427,337.96
  5. Step 5: Solve for x
    x = 160,427,337.96/20,739.32
  6. Step 6: Final answer
    x = 7,735.42

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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.