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Finding the Fourth Proportional to 18,774.46, 25,908.39 and 10,391.02

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Solution

The fourth proportional to 18,774.46, 25,908.39 and 10,391.02 is: 14,339.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,774.46 : 25,908.39 = 10,391.02 : x
  2. Step 2: Convert to fraction form
    18,774.46/25,908.39 = 10,391.02/x
  3. Step 3: Cross multiply
    18,774.46x = 25,908.39 × 10,391.02
  4. Step 4: Simplify right side
    18,774.46x = 269,214,598.66
  5. Step 5: Solve for x
    x = 269,214,598.66/18,774.46
  6. Step 6: Final answer
    x = 14,339.41

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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.