Home / 21,719.25-29,972.60-12,287.61

Finding the Fourth Proportional to 21,719.25, 29,972.60 and 12,287.61

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Solution

The fourth proportional to 21,719.25, 29,972.60 and 12,287.61 is: 16,956.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,719.25 : 29,972.60 = 12,287.61 : x
  2. Step 2: Convert to fraction form
    21,719.25/29,972.60 = 12,287.61/x
  3. Step 3: Cross multiply
    21,719.25x = 29,972.60 × 12,287.61
  4. Step 4: Simplify right side
    21,719.25x = 368,291,558.05
  5. Step 5: Solve for x
    x = 368,291,558.05/21,719.25
  6. Step 6: Final answer
    x = 16,956.92

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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.