Home / 20,739.76-31,109.62-5,157.39

Finding the Fourth Proportional to 20,739.76, 31,109.62 and 5,157.39

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Solution

The fourth proportional to 20,739.76, 31,109.62 and 5,157.39 is: 7,736.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.76 : 31,109.62 = 5,157.39 : x
  2. Step 2: Convert to fraction form
    20,739.76/31,109.62 = 5,157.39/x
  3. Step 3: Cross multiply
    20,739.76x = 31,109.62 × 5,157.39
  4. Step 4: Simplify right side
    20,739.76x = 160,444,443.09
  5. Step 5: Solve for x
    x = 160,444,443.09/20,739.76
  6. Step 6: Final answer
    x = 7,736.08

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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.