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Finding the Fourth Proportional to 18,378, 25,353.78 and 14,383.08

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Solution

The fourth proportional to 18,378, 25,353.78 and 14,383.08 is: 19,842.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,378 : 25,353.78 = 14,383.08 : x
  2. Step 2: Convert to fraction form
    18,378/25,353.78 = 14,383.08/x
  3. Step 3: Cross multiply
    18,378x = 25,353.78 × 14,383.08
  4. Step 4: Simplify right side
    18,378x = 364,665,446.04
  5. Step 5: Solve for x
    x = 364,665,446.04/18,378
  6. Step 6: Final answer
    x = 19,842.50

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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.