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Finding the Fourth Proportional to 12,808.53, 19,212.75 and 5,791.01

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Solution

The fourth proportional to 12,808.53, 19,212.75 and 5,791.01 is: 8,686.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,808.53 : 19,212.75 = 5,791.01 : x
  2. Step 2: Convert to fraction form
    12,808.53/19,212.75 = 5,791.01/x
  3. Step 3: Cross multiply
    12,808.53x = 19,212.75 × 5,791.01
  4. Step 4: Simplify right side
    12,808.53x = 111,261,131.31
  5. Step 5: Solve for x
    x = 111,261,131.31/12,808.53
  6. Step 6: Final answer
    x = 8,686.49

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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.