Home / 20,518.86-30,778.30-15,845.70

Finding the Fourth Proportional to 20,518.86, 30,778.30 and 15,845.70

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Solution

The fourth proportional to 20,518.86, 30,778.30 and 15,845.70 is: 23,768.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.86 : 30,778.30 = 15,845.70 : x
  2. Step 2: Convert to fraction form
    20,518.86/30,778.30 = 15,845.70/x
  3. Step 3: Cross multiply
    20,518.86x = 30,778.30 × 15,845.70
  4. Step 4: Simplify right side
    20,518.86x = 487,703,708.31
  5. Step 5: Solve for x
    x = 487,703,708.31/20,518.86
  6. Step 6: Final answer
    x = 23,768.56

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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.