Home / 21,289.98-31,936.78-8,807.60

Finding the Fourth Proportional to 21,289.98, 31,936.78 and 8,807.60

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Solution

The fourth proportional to 21,289.98, 31,936.78 and 8,807.60 is: 13,212.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.98 : 31,936.78 = 8,807.60 : x
  2. Step 2: Convert to fraction form
    21,289.98/31,936.78 = 8,807.60/x
  3. Step 3: Cross multiply
    21,289.98x = 31,936.78 × 8,807.60
  4. Step 4: Simplify right side
    21,289.98x = 281,286,383.53
  5. Step 5: Solve for x
    x = 281,286,383.53/21,289.98
  6. Step 6: Final answer
    x = 13,212.15

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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.