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Finding the Fourth Proportional to 21,199.63, 31,799.45 and 7,348.63

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Solution

The fourth proportional to 21,199.63, 31,799.45 and 7,348.63 is: 11,022.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,199.63 : 31,799.45 = 7,348.63 : x
  2. Step 2: Convert to fraction form
    21,199.63/31,799.45 = 7,348.63/x
  3. Step 3: Cross multiply
    21,199.63x = 31,799.45 × 7,348.63
  4. Step 4: Simplify right side
    21,199.63x = 233,682,355.51
  5. Step 5: Solve for x
    x = 233,682,355.51/21,199.63
  6. Step 6: Final answer
    x = 11,022.95

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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.