Home / 16,920.09-23,335.29-13,770.81

Finding the Fourth Proportional to 16,920.09, 23,335.29 and 13,770.81

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Solution

The fourth proportional to 16,920.09, 23,335.29 and 13,770.81 is: 18,991.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,920.09 : 23,335.29 = 13,770.81 : x
  2. Step 2: Convert to fraction form
    16,920.09/23,335.29 = 13,770.81/x
  3. Step 3: Cross multiply
    16,920.09x = 23,335.29 × 13,770.81
  4. Step 4: Simplify right side
    16,920.09x = 321,345,844.88
  5. Step 5: Solve for x
    x = 321,345,844.88/16,920.09
  6. Step 6: Final answer
    x = 18,991.97

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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.