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Finding the Fourth Proportional to 19,108.60, 28,662.90 and 5,257.60

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Solution

The fourth proportional to 19,108.60, 28,662.90 and 5,257.60 is: 7,886.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,108.60 : 28,662.90 = 5,257.60 : x
  2. Step 2: Convert to fraction form
    19,108.60/28,662.90 = 5,257.60/x
  3. Step 3: Cross multiply
    19,108.60x = 28,662.90 × 5,257.60
  4. Step 4: Simplify right side
    19,108.60x = 150,698,063.04
  5. Step 5: Solve for x
    x = 150,698,063.04/19,108.60
  6. Step 6: Final answer
    x = 7,886.40

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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.