Home / 20,578.22-28,397.85-11,146.81

Finding the Fourth Proportional to 20,578.22, 28,397.85 and 11,146.81

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Solution

The fourth proportional to 20,578.22, 28,397.85 and 11,146.81 is: 15,382.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,578.22 : 28,397.85 = 11,146.81 : x
  2. Step 2: Convert to fraction form
    20,578.22/28,397.85 = 11,146.81/x
  3. Step 3: Cross multiply
    20,578.22x = 28,397.85 × 11,146.81
  4. Step 4: Simplify right side
    20,578.22x = 316,545,296.37
  5. Step 5: Solve for x
    x = 316,545,296.37/20,578.22
  6. Step 6: Final answer
    x = 15,382.54

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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.