Home / 21,185.48-29,223.80-13,213.86

Finding the Fourth Proportional to 21,185.48, 29,223.80 and 13,213.86

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Solution

The fourth proportional to 21,185.48, 29,223.80 and 13,213.86 is: 18,227.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,185.48 : 29,223.80 = 13,213.86 : x
  2. Step 2: Convert to fraction form
    21,185.48/29,223.80 = 13,213.86/x
  3. Step 3: Cross multiply
    21,185.48x = 29,223.80 × 13,213.86
  4. Step 4: Simplify right side
    21,185.48x = 386,159,201.87
  5. Step 5: Solve for x
    x = 386,159,201.87/21,185.48
  6. Step 6: Final answer
    x = 18,227.54

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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.