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Finding the Fourth Proportional to 12,963.21, 17,884.55 and 8,489.51

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Solution

The fourth proportional to 12,963.21, 17,884.55 and 8,489.51 is: 11,712.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,963.21 : 17,884.55 = 8,489.51 : x
  2. Step 2: Convert to fraction form
    12,963.21/17,884.55 = 8,489.51/x
  3. Step 3: Cross multiply
    12,963.21x = 17,884.55 × 8,489.51
  4. Step 4: Simplify right side
    12,963.21x = 151,831,017.19
  5. Step 5: Solve for x
    x = 151,831,017.19/12,963.21
  6. Step 6: Final answer
    x = 11,712.46

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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.