Home / 21,555.26-29,745.88-13,171.76

Finding the Fourth Proportional to 21,555.26, 29,745.88 and 13,171.76

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Solution

The fourth proportional to 21,555.26, 29,745.88 and 13,171.76 is: 18,176.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,555.26 : 29,745.88 = 13,171.76 : x
  2. Step 2: Convert to fraction form
    21,555.26/29,745.88 = 13,171.76/x
  3. Step 3: Cross multiply
    21,555.26x = 29,745.88 × 13,171.76
  4. Step 4: Simplify right side
    21,555.26x = 391,805,592.35
  5. Step 5: Solve for x
    x = 391,805,592.35/21,555.26
  6. Step 6: Final answer
    x = 18,176.80

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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.