Home / 21,114.15-29,137.16-12,161.63

Finding the Fourth Proportional to 21,114.15, 29,137.16 and 12,161.63

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Solution

The fourth proportional to 21,114.15, 29,137.16 and 12,161.63 is: 16,782.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,114.15 : 29,137.16 = 12,161.63 : x
  2. Step 2: Convert to fraction form
    21,114.15/29,137.16 = 12,161.63/x
  3. Step 3: Cross multiply
    21,114.15x = 29,137.16 × 12,161.63
  4. Step 4: Simplify right side
    21,114.15x = 354,355,152.68
  5. Step 5: Solve for x
    x = 354,355,152.68/21,114.15
  6. Step 6: Final answer
    x = 16,782.83

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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.