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Finding the Fourth Proportional to 14,289.92, 21,435.88 and 4,427.88

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Solution

The fourth proportional to 14,289.92, 21,435.88 and 4,427.88 is: 6,642.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,289.92 : 21,435.88 = 4,427.88 : x
  2. Step 2: Convert to fraction form
    14,289.92/21,435.88 = 4,427.88/x
  3. Step 3: Cross multiply
    14,289.92x = 21,435.88 × 4,427.88
  4. Step 4: Simplify right side
    14,289.92x = 94,915,504.33
  5. Step 5: Solve for x
    x = 94,915,504.33/14,289.92
  6. Step 6: Final answer
    x = 6,642.13

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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.