Home / 20,380.48-30,525.53-15,665.81

Finding the Fourth Proportional to 20,380.48, 30,525.53 and 15,665.81

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Solution

The fourth proportional to 20,380.48, 30,525.53 and 15,665.81 is: 23,463.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,380.48 : 30,525.53 = 15,665.81 : x
  2. Step 2: Convert to fraction form
    20,380.48/30,525.53 = 15,665.81/x
  3. Step 3: Cross multiply
    20,380.48x = 30,525.53 × 15,665.81
  4. Step 4: Simplify right side
    20,380.48x = 478,206,922.17
  5. Step 5: Solve for x
    x = 478,206,922.17/20,380.48
  6. Step 6: Final answer
    x = 23,463.97

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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.