Home / 20,642.82-28,487.48-11,690.30

Finding the Fourth Proportional to 20,642.82, 28,487.48 and 11,690.30

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Solution

The fourth proportional to 20,642.82, 28,487.48 and 11,690.30 is: 16,132.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642.82 : 28,487.48 = 11,690.30 : x
  2. Step 2: Convert to fraction form
    20,642.82/28,487.48 = 11,690.30/x
  3. Step 3: Cross multiply
    20,642.82x = 28,487.48 × 11,690.30
  4. Step 4: Simplify right side
    20,642.82x = 333,026,986.56
  5. Step 5: Solve for x
    x = 333,026,986.56/20,642.82
  6. Step 6: Final answer
    x = 16,132.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.