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Finding the Fourth Proportional to 14,681.92, 21,991.68 and 9,940.96

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Solution

The fourth proportional to 14,681.92, 21,991.68 and 9,940.96 is: 14,890.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,681.92 : 21,991.68 = 9,940.96 : x
  2. Step 2: Convert to fraction form
    14,681.92/21,991.68 = 9,940.96/x
  3. Step 3: Cross multiply
    14,681.92x = 21,991.68 × 9,940.96
  4. Step 4: Simplify right side
    14,681.92x = 218,618,411.21
  5. Step 5: Solve for x
    x = 218,618,411.21/14,681.92
  6. Step 6: Final answer
    x = 14,890.31

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1.5x scale

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.