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Finding the Fourth Proportional to 18,919.08, 28,378.54 and 5,771.41

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Solution

The fourth proportional to 18,919.08, 28,378.54 and 5,771.41 is: 8,657.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,919.08 : 28,378.54 = 5,771.41 : x
  2. Step 2: Convert to fraction form
    18,919.08/28,378.54 = 5,771.41/x
  3. Step 3: Cross multiply
    18,919.08x = 28,378.54 × 5,771.41
  4. Step 4: Simplify right side
    18,919.08x = 163,784,018.79
  5. Step 5: Solve for x
    x = 163,784,018.79/18,919.08
  6. Step 6: Final answer
    x = 8,657.08

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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.