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Finding the Fourth Proportional to 15,804.56, 21,808.37 and 8,731.04

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Solution

The fourth proportional to 15,804.56, 21,808.37 and 8,731.04 is: 12,047.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,804.56 : 21,808.37 = 8,731.04 : x
  2. Step 2: Convert to fraction form
    15,804.56/21,808.37 = 8,731.04/x
  3. Step 3: Cross multiply
    15,804.56x = 21,808.37 × 8,731.04
  4. Step 4: Simplify right side
    15,804.56x = 190,409,663.59
  5. Step 5: Solve for x
    x = 190,409,663.59/15,804.56
  6. Step 6: Final answer
    x = 12,047.77

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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.