Home / 20,739.24-31,108.83-5,156.87

Finding the Fourth Proportional to 20,739.24, 31,108.83 and 5,156.87

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Solution

The fourth proportional to 20,739.24, 31,108.83 and 5,156.87 is: 7,735.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.24 : 31,108.83 = 5,156.87 : x
  2. Step 2: Convert to fraction form
    20,739.24/31,108.83 = 5,156.87/x
  3. Step 3: Cross multiply
    20,739.24x = 31,108.83 × 5,156.87
  4. Step 4: Simplify right side
    20,739.24x = 160,424,036.62
  5. Step 5: Solve for x
    x = 160,424,036.62/20,739.24
  6. Step 6: Final answer
    x = 7,735.29

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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.