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Finding the Fourth Proportional to 12,424.12, 17,130.92 and 9,904.26

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Solution

The fourth proportional to 12,424.12, 17,130.92 and 9,904.26 is: 13,656.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,424.12 : 17,130.92 = 9,904.26 : x
  2. Step 2: Convert to fraction form
    12,424.12/17,130.92 = 9,904.26/x
  3. Step 3: Cross multiply
    12,424.12x = 17,130.92 × 9,904.26
  4. Step 4: Simplify right side
    12,424.12x = 169,669,085.72
  5. Step 5: Solve for x
    x = 169,669,085.72/12,424.12
  6. Step 6: Final answer
    x = 13,656.43

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.