Home / 21,085.09-29,098.94-12,587.56

Finding the Fourth Proportional to 21,085.09, 29,098.94 and 12,587.56

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Solution

The fourth proportional to 21,085.09, 29,098.94 and 12,587.56 is: 17,371.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,085.09 : 29,098.94 = 12,587.56 : x
  2. Step 2: Convert to fraction form
    21,085.09/29,098.94 = 12,587.56/x
  3. Step 3: Cross multiply
    21,085.09x = 29,098.94 × 12,587.56
  4. Step 4: Simplify right side
    21,085.09x = 366,284,590.25
  5. Step 5: Solve for x
    x = 366,284,590.25/21,085.09
  6. Step 6: Final answer
    x = 17,371.73

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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.