Home / 21,160.66-29,181.56-12,661.44

Finding the Fourth Proportional to 21,160.66, 29,181.56 and 12,661.44

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Solution

The fourth proportional to 21,160.66, 29,181.56 and 12,661.44 is: 17,460.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,160.66 : 29,181.56 = 12,661.44 : x
  2. Step 2: Convert to fraction form
    21,160.66/29,181.56 = 12,661.44/x
  3. Step 3: Cross multiply
    21,160.66x = 29,181.56 × 12,661.44
  4. Step 4: Simplify right side
    21,160.66x = 369,480,571.05
  5. Step 5: Solve for x
    x = 369,480,571.05/21,160.66
  6. Step 6: Final answer
    x = 17,460.73

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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.