Home / 22,540.66-31,108.43-12,980.86

Finding the Fourth Proportional to 22,540.66, 31,108.43 and 12,980.86

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Solution

The fourth proportional to 22,540.66, 31,108.43 and 12,980.86 is: 17,914.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,540.66 : 31,108.43 = 12,980.86 : x
  2. Step 2: Convert to fraction form
    22,540.66/31,108.43 = 12,980.86/x
  3. Step 3: Cross multiply
    22,540.66x = 31,108.43 × 12,980.86
  4. Step 4: Simplify right side
    22,540.66x = 403,814,129.33
  5. Step 5: Solve for x
    x = 403,814,129.33/22,540.66
  6. Step 6: Final answer
    x = 17,914.92

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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.