Home / 21,850.70-30,146.19-12,893.72

Finding the Fourth Proportional to 21,850.70, 30,146.19 and 12,893.72

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Solution

The fourth proportional to 21,850.70, 30,146.19 and 12,893.72 is: 17,788.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,850.70 : 30,146.19 = 12,893.72 : x
  2. Step 2: Convert to fraction form
    21,850.70/30,146.19 = 12,893.72/x
  3. Step 3: Cross multiply
    21,850.70x = 30,146.19 × 12,893.72
  4. Step 4: Simplify right side
    21,850.70x = 388,696,532.93
  5. Step 5: Solve for x
    x = 388,696,532.93/21,850.70
  6. Step 6: Final answer
    x = 17,788.75

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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.