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Finding the Fourth Proportional to 7,879,793.60, 11,819,690.40 and 4,520,561.60

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Solution

The fourth proportional to 7,879,793.60, 11,819,690.40 and 4,520,561.60 is: 6,780,842.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,879,793.60 : 11,819,690.40 = 4,520,561.60 : x
  2. Step 2: Convert to fraction form
    7,879,793.60/11,819,690.40 = 4,520,561.60/x
  3. Step 3: Cross multiply
    7,879,793.60x = 11,819,690.40 × 4,520,561.60
  4. Step 4: Simplify right side
    7,879,793.60x = 53,431,638,546,128.64
  5. Step 5: Solve for x
    x = 53,431,638,546,128.64/7,879,793.60
  6. Step 6: Final answer
    x = 6,780,842.40

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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.