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Finding the Fourth Proportional to 12,661.47, 18,992.21 and 3,301.48

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Solution

The fourth proportional to 12,661.47, 18,992.21 and 3,301.48 is: 4,952.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,661.47 : 18,992.21 = 3,301.48 : x
  2. Step 2: Convert to fraction form
    12,661.47/18,992.21 = 3,301.48/x
  3. Step 3: Cross multiply
    12,661.47x = 18,992.21 × 3,301.48
  4. Step 4: Simplify right side
    12,661.47x = 62,702,342.63
  5. Step 5: Solve for x
    x = 62,702,342.63/12,661.47
  6. Step 6: Final answer
    x = 4,952.22

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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.