Home / 21,086.27-31,613.79-12,764.32

Finding the Fourth Proportional to 21,086.27, 31,613.79 and 12,764.32

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Solution

The fourth proportional to 21,086.27, 31,613.79 and 12,764.32 is: 19,137.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,086.27 : 31,613.79 = 12,764.32 : x
  2. Step 2: Convert to fraction form
    21,086.27/31,613.79 = 12,764.32/x
  3. Step 3: Cross multiply
    21,086.27x = 31,613.79 × 12,764.32
  4. Step 4: Simplify right side
    21,086.27x = 403,528,553.40
  5. Step 5: Solve for x
    x = 403,528,553.40/21,086.27
  6. Step 6: Final answer
    x = 19,137.02

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1.5x scale

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.