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Finding the Fourth Proportional to 19,063.95, 28,607.12 and 7,969.78

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Solution

The fourth proportional to 19,063.95, 28,607.12 and 7,969.78 is: 11,959.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,063.95 : 28,607.12 = 7,969.78 : x
  2. Step 2: Convert to fraction form
    19,063.95/28,607.12 = 7,969.78/x
  3. Step 3: Cross multiply
    19,063.95x = 28,607.12 × 7,969.78
  4. Step 4: Simplify right side
    19,063.95x = 227,992,452.83
  5. Step 5: Solve for x
    x = 227,992,452.83/19,063.95
  6. Step 6: Final answer
    x = 11,959.35

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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.