Home / 31,219.84-43,063.68-21,784.96

Finding the Fourth Proportional to 31,219.84, 43,063.68 and 21,784.96

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Solution

The fourth proportional to 31,219.84, 43,063.68 and 21,784.96 is: 30,049.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,219.84 : 43,063.68 = 21,784.96 : x
  2. Step 2: Convert to fraction form
    31,219.84/43,063.68 = 21,784.96/x
  3. Step 3: Cross multiply
    31,219.84x = 43,063.68 × 21,784.96
  4. Step 4: Simplify right side
    31,219.84x = 938,140,546.25
  5. Step 5: Solve for x
    x = 938,140,546.25/31,219.84
  6. Step 6: Final answer
    x = 30,049.50

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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.