Home / 11,416.80-15,755.08-6,448.80

Finding the Fourth Proportional to 11,416.80, 15,755.08 and 6,448.80

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Solution

The fourth proportional to 11,416.80, 15,755.08 and 6,448.80 is: 8,899.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,416.80 : 15,755.08 = 6,448.80 : x
  2. Step 2: Convert to fraction form
    11,416.80/15,755.08 = 6,448.80/x
  3. Step 3: Cross multiply
    11,416.80x = 15,755.08 × 6,448.80
  4. Step 4: Simplify right side
    11,416.80x = 101,601,359.90
  5. Step 5: Solve for x
    x = 101,601,359.90/11,416.80
  6. Step 6: Final answer
    x = 8,899.29

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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.