Home / 20,645.55-28,489.46-11,213.91

Finding the Fourth Proportional to 20,645.55, 28,489.46 and 11,213.91

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Solution

The fourth proportional to 20,645.55, 28,489.46 and 11,213.91 is: 15,474.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.55 : 28,489.46 = 11,213.91 : x
  2. Step 2: Convert to fraction form
    20,645.55/28,489.46 = 11,213.91/x
  3. Step 3: Cross multiply
    20,645.55x = 28,489.46 × 11,213.91
  4. Step 4: Simplify right side
    20,645.55x = 319,478,184.32
  5. Step 5: Solve for x
    x = 319,478,184.32/20,645.55
  6. Step 6: Final answer
    x = 15,474.43

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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.