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Finding the Fourth Proportional to 18,774.84, 28,101.78 and 12,914.04

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Solution

The fourth proportional to 18,774.84, 28,101.78 and 12,914.04 is: 19,329.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,774.84 : 28,101.78 = 12,914.04 : x
  2. Step 2: Convert to fraction form
    18,774.84/28,101.78 = 12,914.04/x
  3. Step 3: Cross multiply
    18,774.84x = 28,101.78 × 12,914.04
  4. Step 4: Simplify right side
    18,774.84x = 362,907,510.99
  5. Step 5: Solve for x
    x = 362,907,510.99/18,774.84
  6. Step 6: Final answer
    x = 19,329.46

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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.