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Finding the Fourth Proportional to 18,992.61, 28,504.44 and 13,451.40

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Solution

The fourth proportional to 18,992.61, 28,504.44 and 13,451.40 is: 20,188.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,992.61 : 28,504.44 = 13,451.40 : x
  2. Step 2: Convert to fraction form
    18,992.61/28,504.44 = 13,451.40/x
  3. Step 3: Cross multiply
    18,992.61x = 28,504.44 × 13,451.40
  4. Step 4: Simplify right side
    18,992.61x = 383,424,624.22
  5. Step 5: Solve for x
    x = 383,424,624.22/18,992.61
  6. Step 6: Final answer
    x = 20,188.10

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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.