Home / 8,686.32-11,986.83-5,147.43

Finding the Fourth Proportional to 8,686.32, 11,986.83 and 5,147.43

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Solution

The fourth proportional to 8,686.32, 11,986.83 and 5,147.43 is: 7,103.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,686.32 : 11,986.83 = 5,147.43 : x
  2. Step 2: Convert to fraction form
    8,686.32/11,986.83 = 5,147.43/x
  3. Step 3: Cross multiply
    8,686.32x = 11,986.83 × 5,147.43
  4. Step 4: Simplify right side
    8,686.32x = 61,701,368.35
  5. Step 5: Solve for x
    x = 61,701,368.35/8,686.32
  6. Step 6: Final answer
    x = 7,103.28

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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.