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Finding the Fourth Proportional to 18,984.70, 28,477.05 and 8,454.70

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Solution

The fourth proportional to 18,984.70, 28,477.05 and 8,454.70 is: 12,682.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,984.70 : 28,477.05 = 8,454.70 : x
  2. Step 2: Convert to fraction form
    18,984.70/28,477.05 = 8,454.70/x
  3. Step 3: Cross multiply
    18,984.70x = 28,477.05 × 8,454.70
  4. Step 4: Simplify right side
    18,984.70x = 240,764,914.64
  5. Step 5: Solve for x
    x = 240,764,914.64/18,984.70
  6. Step 6: Final answer
    x = 12,682.05

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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.