Home / 21,843.28-30,143.55-12,411.84

Finding the Fourth Proportional to 21,843.28, 30,143.55 and 12,411.84

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Solution

The fourth proportional to 21,843.28, 30,143.55 and 12,411.84 is: 17,128.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,843.28 : 30,143.55 = 12,411.84 : x
  2. Step 2: Convert to fraction form
    21,843.28/30,143.55 = 12,411.84/x
  3. Step 3: Cross multiply
    21,843.28x = 30,143.55 × 12,411.84
  4. Step 4: Simplify right side
    21,843.28x = 374,136,919.63
  5. Step 5: Solve for x
    x = 374,136,919.63/21,843.28
  6. Step 6: Final answer
    x = 17,128.24

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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.