Home / 31,986.63-47,979.94-8,613.06

Finding the Fourth Proportional to 31,986.63, 47,979.94 and 8,613.06

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Solution

The fourth proportional to 31,986.63, 47,979.94 and 8,613.06 is: 12,919.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,986.63 : 47,979.94 = 8,613.06 : x
  2. Step 2: Convert to fraction form
    31,986.63/47,979.94 = 8,613.06/x
  3. Step 3: Cross multiply
    31,986.63x = 47,979.94 × 8,613.06
  4. Step 4: Simplify right side
    31,986.63x = 413,254,102.02
  5. Step 5: Solve for x
    x = 413,254,102.02/31,986.63
  6. Step 6: Final answer
    x = 12,919.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.