Home / 21,170.52-29,228.70-13,620.36

Finding the Fourth Proportional to 21,170.52, 29,228.70 and 13,620.36

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Solution

The fourth proportional to 21,170.52, 29,228.70 and 13,620.36 is: 18,804.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,170.52 : 29,228.70 = 13,620.36 : x
  2. Step 2: Convert to fraction form
    21,170.52/29,228.70 = 13,620.36/x
  3. Step 3: Cross multiply
    21,170.52x = 29,228.70 × 13,620.36
  4. Step 4: Simplify right side
    21,170.52x = 398,105,416.33
  5. Step 5: Solve for x
    x = 398,105,416.33/21,170.52
  6. Step 6: Final answer
    x = 18,804.71

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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.