Home / 20,690.91-31,040.96-7,543.25

Finding the Fourth Proportional to 20,690.91, 31,040.96 and 7,543.25

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Solution

The fourth proportional to 20,690.91, 31,040.96 and 7,543.25 is: 11,316.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.91 : 31,040.96 = 7,543.25 : x
  2. Step 2: Convert to fraction form
    20,690.91/31,040.96 = 7,543.25/x
  3. Step 3: Cross multiply
    20,690.91x = 31,040.96 × 7,543.25
  4. Step 4: Simplify right side
    20,690.91x = 234,149,528.60
  5. Step 5: Solve for x
    x = 234,149,528.60/20,690.91
  6. Step 6: Final answer
    x = 11,316.54

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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.