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Finding the Fourth Proportional to 15,357.86, 21,194 and 8,551.98

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Solution

The fourth proportional to 15,357.86, 21,194 and 8,551.98 is: 11,801.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,357.86 : 21,194 = 8,551.98 : x
  2. Step 2: Convert to fraction form
    15,357.86/21,194 = 8,551.98/x
  3. Step 3: Cross multiply
    15,357.86x = 21,194 × 8,551.98
  4. Step 4: Simplify right side
    15,357.86x = 181,250,664.12
  5. Step 5: Solve for x
    x = 181,250,664.12/15,357.86
  6. Step 6: Final answer
    x = 11,801.82

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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.