Home / 20,145.35-30,215.23-5,355.47

Finding the Fourth Proportional to 20,145.35, 30,215.23 and 5,355.47

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Solution

The fourth proportional to 20,145.35, 30,215.23 and 5,355.47 is: 8,032.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,145.35 : 30,215.23 = 5,355.47 : x
  2. Step 2: Convert to fraction form
    20,145.35/30,215.23 = 5,355.47/x
  3. Step 3: Cross multiply
    20,145.35x = 30,215.23 × 5,355.47
  4. Step 4: Simplify right side
    20,145.35x = 161,816,682.27
  5. Step 5: Solve for x
    x = 161,816,682.27/20,145.35
  6. Step 6: Final answer
    x = 8,032.46

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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.