Home / 21,077.80-29,086.22-11,645.76

Finding the Fourth Proportional to 21,077.80, 29,086.22 and 11,645.76

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Solution

The fourth proportional to 21,077.80, 29,086.22 and 11,645.76 is: 16,070.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,077.80 : 29,086.22 = 11,645.76 : x
  2. Step 2: Convert to fraction form
    21,077.80/29,086.22 = 11,645.76/x
  3. Step 3: Cross multiply
    21,077.80x = 29,086.22 × 11,645.76
  4. Step 4: Simplify right side
    21,077.80x = 338,731,137.43
  5. Step 5: Solve for x
    x = 338,731,137.43/21,077.80
  6. Step 6: Final answer
    x = 16,070.52

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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.