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Finding the Fourth Proportional to 18,490.30, 27,728.34 and 14,549.31

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Solution

The fourth proportional to 18,490.30, 27,728.34 and 14,549.31 is: 21,818.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,490.30 : 27,728.34 = 14,549.31 : x
  2. Step 2: Convert to fraction form
    18,490.30/27,728.34 = 14,549.31/x
  3. Step 3: Cross multiply
    18,490.30x = 27,728.34 × 14,549.31
  4. Step 4: Simplify right side
    18,490.30x = 403,428,214.45
  5. Step 5: Solve for x
    x = 403,428,214.45/18,490.30
  6. Step 6: Final answer
    x = 21,818.37

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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.