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Finding the Fourth Proportional to 15,504.69, 21,396 and 8,790.93

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Solution

The fourth proportional to 15,504.69, 21,396 and 8,790.93 is: 12,131.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,504.69 : 21,396 = 8,790.93 : x
  2. Step 2: Convert to fraction form
    15,504.69/21,396 = 8,790.93/x
  3. Step 3: Cross multiply
    15,504.69x = 21,396 × 8,790.93
  4. Step 4: Simplify right side
    15,504.69x = 188,090,738.28
  5. Step 5: Solve for x
    x = 188,090,738.28/15,504.69
  6. Step 6: Final answer
    x = 12,131.22

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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.