Home / 21,086.26-31,613.76-12,764.45

Finding the Fourth Proportional to 21,086.26, 31,613.76 and 12,764.45

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Solution

The fourth proportional to 21,086.26, 31,613.76 and 12,764.45 is: 19,137.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,086.26 : 31,613.76 = 12,764.45 : x
  2. Step 2: Convert to fraction form
    21,086.26/31,613.76 = 12,764.45/x
  3. Step 3: Cross multiply
    21,086.26x = 31,613.76 × 12,764.45
  4. Step 4: Simplify right side
    21,086.26x = 403,532,337.87
  5. Step 5: Solve for x
    x = 403,532,337.87/21,086.26
  6. Step 6: Final answer
    x = 19,137.22

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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.