Home / 20,520.80-30,783-15,042.32

Finding the Fourth Proportional to 20,520.80, 30,783 and 15,042.32

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Solution

The fourth proportional to 20,520.80, 30,783 and 15,042.32 is: 22,564.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520.80 : 30,783 = 15,042.32 : x
  2. Step 2: Convert to fraction form
    20,520.80/30,783 = 15,042.32/x
  3. Step 3: Cross multiply
    20,520.80x = 30,783 × 15,042.32
  4. Step 4: Simplify right side
    20,520.80x = 463,047,736.56
  5. Step 5: Solve for x
    x = 463,047,736.56/20,520.80
  6. Step 6: Final answer
    x = 22,564.80

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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.