Home / 20,998.12-28,977.60-11,566.72

Finding the Fourth Proportional to 20,998.12, 28,977.60 and 11,566.72

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Solution

The fourth proportional to 20,998.12, 28,977.60 and 11,566.72 is: 15,962.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,998.12 : 28,977.60 = 11,566.72 : x
  2. Step 2: Convert to fraction form
    20,998.12/28,977.60 = 11,566.72/x
  3. Step 3: Cross multiply
    20,998.12x = 28,977.60 × 11,566.72
  4. Step 4: Simplify right side
    20,998.12x = 335,175,785.47
  5. Step 5: Solve for x
    x = 335,175,785.47/20,998.12
  6. Step 6: Final answer
    x = 15,962.18

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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.