Home / 20,512.99-30,756.34-8,663.55

Finding the Fourth Proportional to 20,512.99, 30,756.34 and 8,663.55

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Solution

The fourth proportional to 20,512.99, 30,756.34 and 8,663.55 is: 12,989.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,512.99 : 30,756.34 = 8,663.55 : x
  2. Step 2: Convert to fraction form
    20,512.99/30,756.34 = 8,663.55/x
  3. Step 3: Cross multiply
    20,512.99x = 30,756.34 × 8,663.55
  4. Step 4: Simplify right side
    20,512.99x = 266,459,067.75
  5. Step 5: Solve for x
    x = 266,459,067.75/20,512.99
  6. Step 6: Final answer
    x = 12,989.77

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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.