Home / 20,998.31-28,977.67-11,566.87

Finding the Fourth Proportional to 20,998.31, 28,977.67 and 11,566.87

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Solution

The fourth proportional to 20,998.31, 28,977.67 and 11,566.87 is: 15,962.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,998.31 : 28,977.67 = 11,566.87 : x
  2. Step 2: Convert to fraction form
    20,998.31/28,977.67 = 11,566.87/x
  3. Step 3: Cross multiply
    20,998.31x = 28,977.67 × 11,566.87
  4. Step 4: Simplify right side
    20,998.31x = 335,180,883.96
  5. Step 5: Solve for x
    x = 335,180,883.96/20,998.31
  6. Step 6: Final answer
    x = 15,962.28

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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.