Home / 21,116.08-29,143.26-13,160.80

Finding the Fourth Proportional to 21,116.08, 29,143.26 and 13,160.80

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Solution

The fourth proportional to 21,116.08, 29,143.26 and 13,160.80 is: 18,163.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,116.08 : 29,143.26 = 13,160.80 : x
  2. Step 2: Convert to fraction form
    21,116.08/29,143.26 = 13,160.80/x
  3. Step 3: Cross multiply
    21,116.08x = 29,143.26 × 13,160.80
  4. Step 4: Simplify right side
    21,116.08x = 383,548,616.21
  5. Step 5: Solve for x
    x = 383,548,616.21/21,116.08
  6. Step 6: Final answer
    x = 18,163.82

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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.