Home / 20,520.55-30,782.63-15,042.07

Finding the Fourth Proportional to 20,520.55, 30,782.63 and 15,042.07

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Solution

The fourth proportional to 20,520.55, 30,782.63 and 15,042.07 is: 22,564.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520.55 : 30,782.63 = 15,042.07 : x
  2. Step 2: Convert to fraction form
    20,520.55/30,782.63 = 15,042.07/x
  3. Step 3: Cross multiply
    20,520.55x = 30,782.63 × 15,042.07
  4. Step 4: Simplify right side
    20,520.55x = 463,034,400.03
  5. Step 5: Solve for x
    x = 463,034,400.03/20,520.55
  6. Step 6: Final answer
    x = 22,564.42

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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.