Home / 20,398.31-28,150.62-11,899.09

Finding the Fourth Proportional to 20,398.31, 28,150.62 and 11,899.09

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Solution

The fourth proportional to 20,398.31, 28,150.62 and 11,899.09 is: 16,421.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,398.31 : 28,150.62 = 11,899.09 : x
  2. Step 2: Convert to fraction form
    20,398.31/28,150.62 = 11,899.09/x
  3. Step 3: Cross multiply
    20,398.31x = 28,150.62 × 11,899.09
  4. Step 4: Simplify right side
    20,398.31x = 334,966,690.56
  5. Step 5: Solve for x
    x = 334,966,690.56/20,398.31
  6. Step 6: Final answer
    x = 16,421.29

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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.