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Finding the Fourth Proportional to 19,110.10, 28,665.15 and 5,259.10

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Solution

The fourth proportional to 19,110.10, 28,665.15 and 5,259.10 is: 7,888.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,110.10 : 28,665.15 = 5,259.10 : x
  2. Step 2: Convert to fraction form
    19,110.10/28,665.15 = 5,259.10/x
  3. Step 3: Cross multiply
    19,110.10x = 28,665.15 × 5,259.10
  4. Step 4: Simplify right side
    19,110.10x = 150,752,890.37
  5. Step 5: Solve for x
    x = 150,752,890.37/19,110.10
  6. Step 6: Final answer
    x = 7,888.65

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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.