Home / 21,720.63-29,974.54-12,160.92

Finding the Fourth Proportional to 21,720.63, 29,974.54 and 12,160.92

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Solution

The fourth proportional to 21,720.63, 29,974.54 and 12,160.92 is: 16,782.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,720.63 : 29,974.54 = 12,160.92 : x
  2. Step 2: Convert to fraction form
    21,720.63/29,974.54 = 12,160.92/x
  3. Step 3: Cross multiply
    21,720.63x = 29,974.54 × 12,160.92
  4. Step 4: Simplify right side
    21,720.63x = 364,517,919.17
  5. Step 5: Solve for x
    x = 364,517,919.17/21,720.63
  6. Step 6: Final answer
    x = 16,782.11

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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.