Home / 21,140.97-29,172.82-12,182.46

Finding the Fourth Proportional to 21,140.97, 29,172.82 and 12,182.46

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Solution

The fourth proportional to 21,140.97, 29,172.82 and 12,182.46 is: 16,810.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.97 : 29,172.82 = 12,182.46 : x
  2. Step 2: Convert to fraction form
    21,140.97/29,172.82 = 12,182.46/x
  3. Step 3: Cross multiply
    21,140.97x = 29,172.82 × 12,182.46
  4. Step 4: Simplify right side
    21,140.97x = 355,396,712.74
  5. Step 5: Solve for x
    x = 355,396,712.74/21,140.97
  6. Step 6: Final answer
    x = 16,810.80

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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.