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Finding the Fourth Proportional to 18,774.91, 25,907.62 and 11,219.74

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Solution

The fourth proportional to 18,774.91, 25,907.62 and 11,219.74 is: 15,482.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,774.91 : 25,907.62 = 11,219.74 : x
  2. Step 2: Convert to fraction form
    18,774.91/25,907.62 = 11,219.74/x
  3. Step 3: Cross multiply
    18,774.91x = 25,907.62 × 11,219.74
  4. Step 4: Simplify right side
    18,774.91x = 290,676,760.42
  5. Step 5: Solve for x
    x = 290,676,760.42/18,774.91
  6. Step 6: Final answer
    x = 15,482.19

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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.