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Finding the Fourth Proportional to 18,984.51, 28,476.95 and 12,452.09

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Solution

The fourth proportional to 18,984.51, 28,476.95 and 12,452.09 is: 18,678.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,984.51 : 28,476.95 = 12,452.09 : x
  2. Step 2: Convert to fraction form
    18,984.51/28,476.95 = 12,452.09/x
  3. Step 3: Cross multiply
    18,984.51x = 28,476.95 × 12,452.09
  4. Step 4: Simplify right side
    18,984.51x = 354,597,339.68
  5. Step 5: Solve for x
    x = 354,597,339.68/18,984.51
  6. Step 6: Final answer
    x = 18,678.25

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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.