Home / 20,812.08-28,717.80-11,857.86

Finding the Fourth Proportional to 20,812.08, 28,717.80 and 11,857.86

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Solution

The fourth proportional to 20,812.08, 28,717.80 and 11,857.86 is: 16,362.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.08 : 28,717.80 = 11,857.86 : x
  2. Step 2: Convert to fraction form
    20,812.08/28,717.80 = 11,857.86/x
  3. Step 3: Cross multiply
    20,812.08x = 28,717.80 × 11,857.86
  4. Step 4: Simplify right side
    20,812.08x = 340,531,651.91
  5. Step 5: Solve for x
    x = 340,531,651.91/20,812.08
  6. Step 6: Final answer
    x = 16,362.21

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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.