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Finding the Fourth Proportional to 11,784.40, 17,671.20 and 5,207.20

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Solution

The fourth proportional to 11,784.40, 17,671.20 and 5,207.20 is: 7,808.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,784.40 : 17,671.20 = 5,207.20 : x
  2. Step 2: Convert to fraction form
    11,784.40/17,671.20 = 5,207.20/x
  3. Step 3: Cross multiply
    11,784.40x = 17,671.20 × 5,207.20
  4. Step 4: Simplify right side
    11,784.40x = 92,017,472.64
  5. Step 5: Solve for x
    x = 92,017,472.64/11,784.40
  6. Step 6: Final answer
    x = 7,808.41

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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.