Home / 20,405.98-28,160.22-11,453.49

Finding the Fourth Proportional to 20,405.98, 28,160.22 and 11,453.49

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Solution

The fourth proportional to 20,405.98, 28,160.22 and 11,453.49 is: 15,805.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,405.98 : 28,160.22 = 11,453.49 : x
  2. Step 2: Convert to fraction form
    20,405.98/28,160.22 = 11,453.49/x
  3. Step 3: Cross multiply
    20,405.98x = 28,160.22 × 11,453.49
  4. Step 4: Simplify right side
    20,405.98x = 322,532,753.20
  5. Step 5: Solve for x
    x = 322,532,753.20/20,405.98
  6. Step 6: Final answer
    x = 15,805.80

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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.