Home / 20,772.77-28,665.61-11,697.93

Finding the Fourth Proportional to 20,772.77, 28,665.61 and 11,697.93

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Solution

The fourth proportional to 20,772.77, 28,665.61 and 11,697.93 is: 16,142.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.77 : 28,665.61 = 11,697.93 : x
  2. Step 2: Convert to fraction form
    20,772.77/28,665.61 = 11,697.93/x
  3. Step 3: Cross multiply
    20,772.77x = 28,665.61 × 11,697.93
  4. Step 4: Simplify right side
    20,772.77x = 335,328,269.94
  5. Step 5: Solve for x
    x = 335,328,269.94/20,772.77
  6. Step 6: Final answer
    x = 16,142.69

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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.