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Finding the Fourth Proportional to 21,886.55, 32,840.08 and 10,787.19

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Solution

The fourth proportional to 21,886.55, 32,840.08 and 10,787.19 is: 16,185.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,886.55 : 32,840.08 = 10,787.19 : x
  2. Step 2: Convert to fraction form
    21,886.55/32,840.08 = 10,787.19/x
  3. Step 3: Cross multiply
    21,886.55x = 32,840.08 × 10,787.19
  4. Step 4: Simplify right side
    21,886.55x = 354,252,018.37
  5. Step 5: Solve for x
    x = 354,252,018.37/21,886.55
  6. Step 6: Final answer
    x = 16,185.83

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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.