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Finding the Fourth Proportional to 19,260.90, 28,892.16 and 6,111.90

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Solution

The fourth proportional to 19,260.90, 28,892.16 and 6,111.90 is: 9,168.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,260.90 : 28,892.16 = 6,111.90 : x
  2. Step 2: Convert to fraction form
    19,260.90/28,892.16 = 6,111.90/x
  3. Step 3: Cross multiply
    19,260.90x = 28,892.16 × 6,111.90
  4. Step 4: Simplify right side
    19,260.90x = 176,585,992.70
  5. Step 5: Solve for x
    x = 176,585,992.70/19,260.90
  6. Step 6: Final answer
    x = 9,168.11

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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.