Home / 8,690.06-11,989.14-5,707.51

Finding the Fourth Proportional to 8,690.06, 11,989.14 and 5,707.51

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Solution

The fourth proportional to 8,690.06, 11,989.14 and 5,707.51 is: 7,874.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,690.06 : 11,989.14 = 5,707.51 : x
  2. Step 2: Convert to fraction form
    8,690.06/11,989.14 = 5,707.51/x
  3. Step 3: Cross multiply
    8,690.06x = 11,989.14 × 5,707.51
  4. Step 4: Simplify right side
    8,690.06x = 68,428,136.44
  5. Step 5: Solve for x
    x = 68,428,136.44/8,690.06
  6. Step 6: Final answer
    x = 7,874.30

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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.