Home / 20,910.45-28,843.29-12,406.56

Finding the Fourth Proportional to 20,910.45, 28,843.29 and 12,406.56

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Solution

The fourth proportional to 20,910.45, 28,843.29 and 12,406.56 is: 17,113.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,910.45 : 28,843.29 = 12,406.56 : x
  2. Step 2: Convert to fraction form
    20,910.45/28,843.29 = 12,406.56/x
  3. Step 3: Cross multiply
    20,910.45x = 28,843.29 × 12,406.56
  4. Step 4: Simplify right side
    20,910.45x = 357,845,899.82
  5. Step 5: Solve for x
    x = 357,845,899.82/20,910.45
  6. Step 6: Final answer
    x = 17,113.25

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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.