Home / 21,083.95-29,109.27-13,137.85

Finding the Fourth Proportional to 21,083.95, 29,109.27 and 13,137.85

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Solution

The fourth proportional to 21,083.95, 29,109.27 and 13,137.85 is: 18,138.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,083.95 : 29,109.27 = 13,137.85 : x
  2. Step 2: Convert to fraction form
    21,083.95/29,109.27 = 13,137.85/x
  3. Step 3: Cross multiply
    21,083.95x = 29,109.27 × 13,137.85
  4. Step 4: Simplify right side
    21,083.95x = 382,433,222.87
  5. Step 5: Solve for x
    x = 382,433,222.87/21,083.95
  6. Step 6: Final answer
    x = 18,138.59

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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.