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Finding the Fourth Proportional to 12,804.50, 17,670.21 and 6,916.50

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Solution

The fourth proportional to 12,804.50, 17,670.21 and 6,916.50 is: 9,544.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,804.50 : 17,670.21 = 6,916.50 : x
  2. Step 2: Convert to fraction form
    12,804.50/17,670.21 = 6,916.50/x
  3. Step 3: Cross multiply
    12,804.50x = 17,670.21 × 6,916.50
  4. Step 4: Simplify right side
    12,804.50x = 122,216,007.47
  5. Step 5: Solve for x
    x = 122,216,007.47/12,804.50
  6. Step 6: Final answer
    x = 9,544.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.