Home / 8,690.15-11,989.17-5,707.64

Finding the Fourth Proportional to 8,690.15, 11,989.17 and 5,707.64

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Solution

The fourth proportional to 8,690.15, 11,989.17 and 5,707.64 is: 7,874.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,690.15 : 11,989.17 = 5,707.64 : x
  2. Step 2: Convert to fraction form
    8,690.15/11,989.17 = 5,707.64/x
  3. Step 3: Cross multiply
    8,690.15x = 11,989.17 × 5,707.64
  4. Step 4: Simplify right side
    8,690.15x = 68,429,866.26
  5. Step 5: Solve for x
    x = 68,429,866.26/8,690.15
  6. Step 6: Final answer
    x = 7,874.42

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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.