Home / 21,122.90-29,152.68-12,168.68

Finding the Fourth Proportional to 21,122.90, 29,152.68 and 12,168.68

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Solution

The fourth proportional to 21,122.90, 29,152.68 and 12,168.68 is: 16,794.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.90 : 29,152.68 = 12,168.68 : x
  2. Step 2: Convert to fraction form
    21,122.90/29,152.68 = 12,168.68/x
  3. Step 3: Cross multiply
    21,122.90x = 29,152.68 × 12,168.68
  4. Step 4: Simplify right side
    21,122.90x = 354,749,634.06
  5. Step 5: Solve for x
    x = 354,749,634.06/21,122.90
  6. Step 6: Final answer
    x = 16,794.55

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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.