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Finding the Fourth Proportional to 7,788,662.80, 11,682,994.20 and 4,429,430.80

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Solution

The fourth proportional to 7,788,662.80, 11,682,994.20 and 4,429,430.80 is: 6,644,146.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,788,662.80 : 11,682,994.20 = 4,429,430.80 : x
  2. Step 2: Convert to fraction form
    7,788,662.80/11,682,994.20 = 4,429,430.80/x
  3. Step 3: Cross multiply
    7,788,662.80x = 11,682,994.20 × 4,429,430.80
  4. Step 4: Simplify right side
    7,788,662.80x = 51,749,014,345,701.35
  5. Step 5: Solve for x
    x = 51,749,014,345,701.35/7,788,662.80
  6. Step 6: Final answer
    x = 6,644,146.20

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Double scale
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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.