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Finding the Fourth Proportional to 12,799, 19,199.60 and 3,565

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Solution

The fourth proportional to 12,799, 19,199.60 and 3,565 is: 5,347.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,799 : 19,199.60 = 3,565 : x
  2. Step 2: Convert to fraction form
    12,799/19,199.60 = 3,565/x
  3. Step 3: Cross multiply
    12,799x = 19,199.60 × 3,565
  4. Step 4: Simplify right side
    12,799x = 68,446,574
  5. Step 5: Solve for x
    x = 68,446,574/12,799
  6. Step 6: Final answer
    x = 5,347.81

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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.