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Finding the Fourth Proportional to 11,820, 17,730 and 4,028.88

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Solution

The fourth proportional to 11,820, 17,730 and 4,028.88 is: 6,043.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,820 : 17,730 = 4,028.88 : x
  2. Step 2: Convert to fraction form
    11,820/17,730 = 4,028.88/x
  3. Step 3: Cross multiply
    11,820x = 17,730 × 4,028.88
  4. Step 4: Simplify right side
    11,820x = 71,432,042.40
  5. Step 5: Solve for x
    x = 71,432,042.40/11,820
  6. Step 6: Final answer
    x = 6,043.32

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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.