Home / 21,157.80-29,184.56-13,613.96

Finding the Fourth Proportional to 21,157.80, 29,184.56 and 13,613.96

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Solution

The fourth proportional to 21,157.80, 29,184.56 and 13,613.96 is: 18,778.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,157.80 : 29,184.56 = 13,613.96 : x
  2. Step 2: Convert to fraction form
    21,157.80/29,184.56 = 13,613.96/x
  3. Step 3: Cross multiply
    21,157.80x = 29,184.56 × 13,613.96
  4. Step 4: Simplify right side
    21,157.80x = 397,317,432.46
  5. Step 5: Solve for x
    x = 397,317,432.46/21,157.80
  6. Step 6: Final answer
    x = 18,778.77

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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.