Home / 21,177.09-29,223.94-13,108.60

Finding the Fourth Proportional to 21,177.09, 29,223.94 and 13,108.60

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Solution

The fourth proportional to 21,177.09, 29,223.94 and 13,108.60 is: 18,089.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,177.09 : 29,223.94 = 13,108.60 : x
  2. Step 2: Convert to fraction form
    21,177.09/29,223.94 = 13,108.60/x
  3. Step 3: Cross multiply
    21,177.09x = 29,223.94 × 13,108.60
  4. Step 4: Simplify right side
    21,177.09x = 383,084,939.88
  5. Step 5: Solve for x
    x = 383,084,939.88/21,177.09
  6. Step 6: Final answer
    x = 18,089.59

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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.