Home / 21,124.15-29,152.68-12,171.49

Finding the Fourth Proportional to 21,124.15, 29,152.68 and 12,171.49

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Solution

The fourth proportional to 21,124.15, 29,152.68 and 12,171.49 is: 16,797.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,124.15 : 29,152.68 = 12,171.49 : x
  2. Step 2: Convert to fraction form
    21,124.15/29,152.68 = 12,171.49/x
  3. Step 3: Cross multiply
    21,124.15x = 29,152.68 × 12,171.49
  4. Step 4: Simplify right side
    21,124.15x = 354,831,553.09
  5. Step 5: Solve for x
    x = 354,831,553.09/21,124.15
  6. Step 6: Final answer
    x = 16,797.44

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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.