Home / 21,157.76-29,184.44-13,613.90

Finding the Fourth Proportional to 21,157.76, 29,184.44 and 13,613.90

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Solution

The fourth proportional to 21,157.76, 29,184.44 and 13,613.90 is: 18,778.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,157.76 : 29,184.44 = 13,613.90 : x
  2. Step 2: Convert to fraction form
    21,157.76/29,184.44 = 13,613.90/x
  3. Step 3: Cross multiply
    21,157.76x = 29,184.44 × 13,613.90
  4. Step 4: Simplify right side
    21,157.76x = 397,313,833.72
  5. Step 5: Solve for x
    x = 397,313,833.72/21,157.76
  6. Step 6: Final answer
    x = 18,778.63

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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.