Home / 20,739.53-31,109.25-5,157.15

Finding the Fourth Proportional to 20,739.53, 31,109.25 and 5,157.15

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Solution

The fourth proportional to 20,739.53, 31,109.25 and 5,157.15 is: 7,735.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.53 : 31,109.25 = 5,157.15 : x
  2. Step 2: Convert to fraction form
    20,739.53/31,109.25 = 5,157.15/x
  3. Step 3: Cross multiply
    20,739.53x = 31,109.25 × 5,157.15
  4. Step 4: Simplify right side
    20,739.53x = 160,435,068.64
  5. Step 5: Solve for x
    x = 160,435,068.64/20,739.53
  6. Step 6: Final answer
    x = 7,735.72

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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.