Home / 20,859.05-28,785.27-12,902.02

Finding the Fourth Proportional to 20,859.05, 28,785.27 and 12,902.02

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Solution

The fourth proportional to 20,859.05, 28,785.27 and 12,902.02 is: 17,804.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,859.05 : 28,785.27 = 12,902.02 : x
  2. Step 2: Convert to fraction form
    20,859.05/28,785.27 = 12,902.02/x
  3. Step 3: Cross multiply
    20,859.05x = 28,785.27 × 12,902.02
  4. Step 4: Simplify right side
    20,859.05x = 371,388,105.66
  5. Step 5: Solve for x
    x = 371,388,105.66/20,859.05
  6. Step 6: Final answer
    x = 17,804.65

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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.