Home / 11,811.76-16,300.24-6,434.20

Finding the Fourth Proportional to 11,811.76, 16,300.24 and 6,434.20

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Solution

The fourth proportional to 11,811.76, 16,300.24 and 6,434.20 is: 8,879.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,811.76 : 16,300.24 = 6,434.20 : x
  2. Step 2: Convert to fraction form
    11,811.76/16,300.24 = 6,434.20/x
  3. Step 3: Cross multiply
    11,811.76x = 16,300.24 × 6,434.20
  4. Step 4: Simplify right side
    11,811.76x = 104,879,004.21
  5. Step 5: Solve for x
    x = 104,879,004.21/11,811.76
  6. Step 6: Final answer
    x = 8,879.20

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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.