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Finding the Fourth Proportional to 7,978,445.60, 11,967,667.80 and 1,994,813.60

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Solution

The fourth proportional to 7,978,445.60, 11,967,667.80 and 1,994,813.60 is: 2,992,220.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,978,445.60 : 11,967,667.80 = 1,994,813.60 : x
  2. Step 2: Convert to fraction form
    7,978,445.60/11,967,667.80 = 1,994,813.60/x
  3. Step 3: Cross multiply
    7,978,445.60x = 11,967,667.80 × 1,994,813.60
  4. Step 4: Simplify right side
    7,978,445.60x = 23,873,266,487,722.08
  5. Step 5: Solve for x
    x = 23,873,266,487,722.08/7,978,445.60
  6. Step 6: Final answer
    x = 2,992,220.25

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Similar ratio
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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.