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Finding the Fourth Proportional to 18,774.66, 25,907.28 and 11,219.49

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Solution

The fourth proportional to 18,774.66, 25,907.28 and 11,219.49 is: 15,481.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,774.66 : 25,907.28 = 11,219.49 : x
  2. Step 2: Convert to fraction form
    18,774.66/25,907.28 = 11,219.49/x
  3. Step 3: Cross multiply
    18,774.66x = 25,907.28 × 11,219.49
  4. Step 4: Simplify right side
    18,774.66x = 290,666,412.79
  5. Step 5: Solve for x
    x = 290,666,412.79/18,774.66
  6. Step 6: Final answer
    x = 15,481.85

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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.