Home / 8,722.22-12,039.75-5,185.42

Finding the Fourth Proportional to 8,722.22, 12,039.75 and 5,185.42

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Solution

The fourth proportional to 8,722.22, 12,039.75 and 5,185.42 is: 7,157.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,722.22 : 12,039.75 = 5,185.42 : x
  2. Step 2: Convert to fraction form
    8,722.22/12,039.75 = 5,185.42/x
  3. Step 3: Cross multiply
    8,722.22x = 12,039.75 × 5,185.42
  4. Step 4: Simplify right side
    8,722.22x = 62,431,130.35
  5. Step 5: Solve for x
    x = 62,431,130.35/8,722.22
  6. Step 6: Final answer
    x = 7,157.72

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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.