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Finding the Fourth Proportional to 19,080, 28,620 and 8,136

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Solution

The fourth proportional to 19,080, 28,620 and 8,136 is: 12,204

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,080 : 28,620 = 8,136 : x
  2. Step 2: Convert to fraction form
    19,080/28,620 = 8,136/x
  3. Step 3: Cross multiply
    19,080x = 28,620 × 8,136
  4. Step 4: Simplify right side
    19,080x = 232,852,320
  5. Step 5: Solve for x
    x = 232,852,320/19,080
  6. Step 6: Final answer
    x = 12,204

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.