Home / 11,121.60-15,328.80-8,464.80

Finding the Fourth Proportional to 11,121.60, 15,328.80 and 8,464.80

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Solution

The fourth proportional to 11,121.60, 15,328.80 and 8,464.80 is: 11,666.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,121.60 : 15,328.80 = 8,464.80 : x
  2. Step 2: Convert to fraction form
    11,121.60/15,328.80 = 8,464.80/x
  3. Step 3: Cross multiply
    11,121.60x = 15,328.80 × 8,464.80
  4. Step 4: Simplify right side
    11,121.60x = 129,755,226.24
  5. Step 5: Solve for x
    x = 129,755,226.24/11,121.60
  6. Step 6: Final answer
    x = 11,666.96

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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.