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Finding the Fourth Proportional to 18,145.74, 27,209.88 and 11,905.50

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Solution

The fourth proportional to 18,145.74, 27,209.88 and 11,905.50 is: 17,852.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,145.74 : 27,209.88 = 11,905.50 : x
  2. Step 2: Convert to fraction form
    18,145.74/27,209.88 = 11,905.50/x
  3. Step 3: Cross multiply
    18,145.74x = 27,209.88 × 11,905.50
  4. Step 4: Simplify right side
    18,145.74x = 323,947,226.34
  5. Step 5: Solve for x
    x = 323,947,226.34/18,145.74
  6. Step 6: Final answer
    x = 17,852.52

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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.