Home / 15,149.86-20,909.31-8,861.02

Finding the Fourth Proportional to 15,149.86, 20,909.31 and 8,861.02

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Solution

The fourth proportional to 15,149.86, 20,909.31 and 8,861.02 is: 12,229.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,149.86 : 20,909.31 = 8,861.02 : x
  2. Step 2: Convert to fraction form
    15,149.86/20,909.31 = 8,861.02/x
  3. Step 3: Cross multiply
    15,149.86x = 20,909.31 × 8,861.02
  4. Step 4: Simplify right side
    15,149.86x = 185,277,814.10
  5. Step 5: Solve for x
    x = 185,277,814.10/15,149.86
  6. Step 6: Final answer
    x = 12,229.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.