Home / 21,073.55-29,081.47-12,120.82

Finding the Fourth Proportional to 21,073.55, 29,081.47 and 12,120.82

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Solution

The fourth proportional to 21,073.55, 29,081.47 and 12,120.82 is: 16,726.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,073.55 : 29,081.47 = 12,120.82 : x
  2. Step 2: Convert to fraction form
    21,073.55/29,081.47 = 12,120.82/x
  3. Step 3: Cross multiply
    21,073.55x = 29,081.47 × 12,120.82
  4. Step 4: Simplify right side
    21,073.55x = 352,491,263.21
  5. Step 5: Solve for x
    x = 352,491,263.21/21,073.55
  6. Step 6: Final answer
    x = 16,726.71

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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.