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Finding the Fourth Proportional to 14,940.73, 20,620.61 and 8,655.13

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Solution

The fourth proportional to 14,940.73, 20,620.61 and 8,655.13 is: 11,945.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,940.73 : 20,620.61 = 8,655.13 : x
  2. Step 2: Convert to fraction form
    14,940.73/20,620.61 = 8,655.13/x
  3. Step 3: Cross multiply
    14,940.73x = 20,620.61 × 8,655.13
  4. Step 4: Simplify right side
    14,940.73x = 178,474,060.23
  5. Step 5: Solve for x
    x = 178,474,060.23/14,940.73
  6. Step 6: Final answer
    x = 11,945.47

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1.5x scale

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.