Home / 6,515.15-8,990.80-3,682.51

Finding the Fourth Proportional to 6,515.15, 8,990.80 and 3,682.51

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Solution

The fourth proportional to 6,515.15, 8,990.80 and 3,682.51 is: 5,081.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,515.15 : 8,990.80 = 3,682.51 : x
  2. Step 2: Convert to fraction form
    6,515.15/8,990.80 = 3,682.51/x
  3. Step 3: Cross multiply
    6,515.15x = 8,990.80 × 3,682.51
  4. Step 4: Simplify right side
    6,515.15x = 33,108,679.22
  5. Step 5: Solve for x
    x = 33,108,679.22/6,515.15
  6. Step 6: Final answer
    x = 5,081.80

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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.