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Finding the Fourth Proportional to 21,009.22, 31,518.72 and 6,968.22

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Solution

The fourth proportional to 21,009.22, 31,518.72 and 6,968.22 is: 10,453.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.22 : 31,518.72 = 6,968.22 : x
  2. Step 2: Convert to fraction form
    21,009.22/31,518.72 = 6,968.22/x
  3. Step 3: Cross multiply
    21,009.22x = 31,518.72 × 6,968.22
  4. Step 4: Simplify right side
    21,009.22x = 219,629,200.06
  5. Step 5: Solve for x
    x = 219,629,200.06/21,009.22
  6. Step 6: Final answer
    x = 10,453.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.