Home / 20,745.42-31,138.29-19,621.62

Finding the Fourth Proportional to 20,745.42, 31,138.29 and 19,621.62

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Solution

The fourth proportional to 20,745.42, 31,138.29 and 19,621.62 is: 29,451.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745.42 : 31,138.29 = 19,621.62 : x
  2. Step 2: Convert to fraction form
    20,745.42/31,138.29 = 19,621.62/x
  3. Step 3: Cross multiply
    20,745.42x = 31,138.29 × 19,621.62
  4. Step 4: Simplify right side
    20,745.42x = 610,983,693.83
  5. Step 5: Solve for x
    x = 610,983,693.83/20,745.42
  6. Step 6: Final answer
    x = 29,451.50

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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.