Home / 21,113.22-29,135.25-12,160.98

Finding the Fourth Proportional to 21,113.22, 29,135.25 and 12,160.98

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Solution

The fourth proportional to 21,113.22, 29,135.25 and 12,160.98 is: 16,781.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,113.22 : 29,135.25 = 12,160.98 : x
  2. Step 2: Convert to fraction form
    21,113.22/29,135.25 = 12,160.98/x
  3. Step 3: Cross multiply
    21,113.22x = 29,135.25 × 12,160.98
  4. Step 4: Simplify right side
    21,113.22x = 354,313,192.55
  5. Step 5: Solve for x
    x = 354,313,192.55/21,113.22
  6. Step 6: Final answer
    x = 16,781.58

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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.