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Finding the Fourth Proportional to 19,317.65, 28,978.59 and 6,166.95

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Solution

The fourth proportional to 19,317.65, 28,978.59 and 6,166.95 is: 9,251.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,317.65 : 28,978.59 = 6,166.95 : x
  2. Step 2: Convert to fraction form
    19,317.65/28,978.59 = 6,166.95/x
  3. Step 3: Cross multiply
    19,317.65x = 28,978.59 × 6,166.95
  4. Step 4: Simplify right side
    19,317.65x = 178,709,515.60
  5. Step 5: Solve for x
    x = 178,709,515.60/19,317.65
  6. Step 6: Final answer
    x = 9,251.10

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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.