Home / 20,814.59-31,221.82-7,487.56

Finding the Fourth Proportional to 20,814.59, 31,221.82 and 7,487.56

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Solution

The fourth proportional to 20,814.59, 31,221.82 and 7,487.56 is: 11,231.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,814.59 : 31,221.82 = 7,487.56 : x
  2. Step 2: Convert to fraction form
    20,814.59/31,221.82 = 7,487.56/x
  3. Step 3: Cross multiply
    20,814.59x = 31,221.82 × 7,487.56
  4. Step 4: Simplify right side
    20,814.59x = 233,775,213.12
  5. Step 5: Solve for x
    x = 233,775,213.12/20,814.59
  6. Step 6: Final answer
    x = 11,231.32

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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.