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Finding the Fourth Proportional to 13,693.70, 18,900.24 and 8,654.72

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Solution

The fourth proportional to 13,693.70, 18,900.24 and 8,654.72 is: 11,945.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,693.70 : 18,900.24 = 8,654.72 : x
  2. Step 2: Convert to fraction form
    13,693.70/18,900.24 = 8,654.72/x
  3. Step 3: Cross multiply
    13,693.70x = 18,900.24 × 8,654.72
  4. Step 4: Simplify right side
    13,693.70x = 163,576,285.13
  5. Step 5: Solve for x
    x = 163,576,285.13/13,693.70
  6. Step 6: Final answer
    x = 11,945.37

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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.