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Finding the Fourth Proportional to 15,985.80, 22,062.90 and 12,201.80

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Solution

The fourth proportional to 15,985.80, 22,062.90 and 12,201.80 is: 16,840.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,985.80 : 22,062.90 = 12,201.80 : x
  2. Step 2: Convert to fraction form
    15,985.80/22,062.90 = 12,201.80/x
  3. Step 3: Cross multiply
    15,985.80x = 22,062.90 × 12,201.80
  4. Step 4: Simplify right side
    15,985.80x = 269,207,093.22
  5. Step 5: Solve for x
    x = 269,207,093.22/15,985.80
  6. Step 6: Final answer
    x = 16,840.39

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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.