Home / 21,845.97-30,143.69-12,284.50

Finding the Fourth Proportional to 21,845.97, 30,143.69 and 12,284.50

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Solution

The fourth proportional to 21,845.97, 30,143.69 and 12,284.50 is: 16,950.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,845.97 : 30,143.69 = 12,284.50 : x
  2. Step 2: Convert to fraction form
    21,845.97/30,143.69 = 12,284.50/x
  3. Step 3: Cross multiply
    21,845.97x = 30,143.69 × 12,284.50
  4. Step 4: Simplify right side
    21,845.97x = 370,300,343.07
  5. Step 5: Solve for x
    x = 370,300,343.07/21,845.97
  6. Step 6: Final answer
    x = 16,950.51

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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.