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Finding the Fourth Proportional to 19,361.28, 29,051.52 and 8,960.64

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Solution

The fourth proportional to 19,361.28, 29,051.52 and 8,960.64 is: 13,445.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,361.28 : 29,051.52 = 8,960.64 : x
  2. Step 2: Convert to fraction form
    19,361.28/29,051.52 = 8,960.64/x
  3. Step 3: Cross multiply
    19,361.28x = 29,051.52 × 8,960.64
  4. Step 4: Simplify right side
    19,361.28x = 260,320,212.17
  5. Step 5: Solve for x
    x = 260,320,212.17/19,361.28
  6. Step 6: Final answer
    x = 13,445.40

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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.