Home / 21,122.36-29,141.74-12,169.64

Finding the Fourth Proportional to 21,122.36, 29,141.74 and 12,169.64

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Solution

The fourth proportional to 21,122.36, 29,141.74 and 12,169.64 is: 16,790.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.36 : 29,141.74 = 12,169.64 : x
  2. Step 2: Convert to fraction form
    21,122.36/29,141.74 = 12,169.64/x
  3. Step 3: Cross multiply
    21,122.36x = 29,141.74 × 12,169.64
  4. Step 4: Simplify right side
    21,122.36x = 354,644,639.69
  5. Step 5: Solve for x
    x = 354,644,639.69/21,122.36
  6. Step 6: Final answer
    x = 16,790.01

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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.