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Finding the Fourth Proportional to 12,424.51, 17,144 and 7,118.47

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Solution

The fourth proportional to 12,424.51, 17,144 and 7,118.47 is: 9,822.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,424.51 : 17,144 = 7,118.47 : x
  2. Step 2: Convert to fraction form
    12,424.51/17,144 = 7,118.47/x
  3. Step 3: Cross multiply
    12,424.51x = 17,144 × 7,118.47
  4. Step 4: Simplify right side
    12,424.51x = 122,038,963.96
  5. Step 5: Solve for x
    x = 122,038,963.96/12,424.51
  6. Step 6: Final answer
    x = 9,822.44

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1.5x scale

Why These Related Problems?

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