Home / 21,117.12-29,145.24-12,163.02

Finding the Fourth Proportional to 21,117.12, 29,145.24 and 12,163.02

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Solution

The fourth proportional to 21,117.12, 29,145.24 and 12,163.02 is: 16,787.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,117.12 : 29,145.24 = 12,163.02 : x
  2. Step 2: Convert to fraction form
    21,117.12/29,145.24 = 12,163.02/x
  3. Step 3: Cross multiply
    21,117.12x = 29,145.24 × 12,163.02
  4. Step 4: Simplify right side
    21,117.12x = 354,494,137.02
  5. Step 5: Solve for x
    x = 354,494,137.02/21,117.12
  6. Step 6: Final answer
    x = 16,787.05

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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.