Home / 20,739.48-31,109.36-5,157.11

Finding the Fourth Proportional to 20,739.48, 31,109.36 and 5,157.11

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Solution

The fourth proportional to 20,739.48, 31,109.36 and 5,157.11 is: 7,735.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.48 : 31,109.36 = 5,157.11 : x
  2. Step 2: Convert to fraction form
    20,739.48/31,109.36 = 5,157.11/x
  3. Step 3: Cross multiply
    20,739.48x = 31,109.36 × 5,157.11
  4. Step 4: Simplify right side
    20,739.48x = 160,434,210.22
  5. Step 5: Solve for x
    x = 160,434,210.22/20,739.48
  6. Step 6: Final answer
    x = 7,735.69

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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.