Home / 11,405.55-15,739.50-6,369.86

Finding the Fourth Proportional to 11,405.55, 15,739.50 and 6,369.86

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Solution

The fourth proportional to 11,405.55, 15,739.50 and 6,369.86 is: 8,790.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,405.55 : 15,739.50 = 6,369.86 : x
  2. Step 2: Convert to fraction form
    11,405.55/15,739.50 = 6,369.86/x
  3. Step 3: Cross multiply
    11,405.55x = 15,739.50 × 6,369.86
  4. Step 4: Simplify right side
    11,405.55x = 100,258,332.77
  5. Step 5: Solve for x
    x = 100,258,332.77/11,405.55
  6. Step 6: Final answer
    x = 8,790.31

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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.