Home / 20,187.90-30,249.45-13,254.30

Finding the Fourth Proportional to 20,187.90, 30,249.45 and 13,254.30

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Solution

The fourth proportional to 20,187.90, 30,249.45 and 13,254.30 is: 19,860.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,187.90 : 30,249.45 = 13,254.30 : x
  2. Step 2: Convert to fraction form
    20,187.90/30,249.45 = 13,254.30/x
  3. Step 3: Cross multiply
    20,187.90x = 30,249.45 × 13,254.30
  4. Step 4: Simplify right side
    20,187.90x = 400,935,285.14
  5. Step 5: Solve for x
    x = 400,935,285.14/20,187.90
  6. Step 6: Final answer
    x = 19,860.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.