Home / 21,156.98-29,183.43-13,613.15

Finding the Fourth Proportional to 21,156.98, 29,183.43 and 13,613.15

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Solution

The fourth proportional to 21,156.98, 29,183.43 and 13,613.15 is: 18,777.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,156.98 : 29,183.43 = 13,613.15 : x
  2. Step 2: Convert to fraction form
    21,156.98/29,183.43 = 13,613.15/x
  3. Step 3: Cross multiply
    21,156.98x = 29,183.43 × 13,613.15
  4. Step 4: Simplify right side
    21,156.98x = 397,278,264.19
  5. Step 5: Solve for x
    x = 397,278,264.19/21,156.98
  6. Step 6: Final answer
    x = 18,777.65

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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.