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Finding the Fourth Proportional to 12,455,201.80, 18,682,802.70 and 3,479,739.40

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Solution

The fourth proportional to 12,455,201.80, 18,682,802.70 and 3,479,739.40 is: 5,219,609.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,455,201.80 : 18,682,802.70 = 3,479,739.40 : x
  2. Step 2: Convert to fraction form
    12,455,201.80/18,682,802.70 = 3,479,739.40/x
  3. Step 3: Cross multiply
    12,455,201.80x = 18,682,802.70 × 3,479,739.40
  4. Step 4: Simplify right side
    12,455,201.80x = 65,011,284,657,616.38
  5. Step 5: Solve for x
    x = 65,011,284,657,616.38/12,455,201.80
  6. Step 6: Final answer
    x = 5,219,609.10

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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.