Home / 20,489.72-28,282.22-13,775.62

Finding the Fourth Proportional to 20,489.72, 28,282.22 and 13,775.62

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Solution

The fourth proportional to 20,489.72, 28,282.22 and 13,775.62 is: 19,014.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.72 : 28,282.22 = 13,775.62 : x
  2. Step 2: Convert to fraction form
    20,489.72/28,282.22 = 13,775.62/x
  3. Step 3: Cross multiply
    20,489.72x = 28,282.22 × 13,775.62
  4. Step 4: Simplify right side
    20,489.72x = 389,605,115.48
  5. Step 5: Solve for x
    x = 389,605,115.48/20,489.72
  6. Step 6: Final answer
    x = 19,014.66

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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.