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Finding the Fourth Proportional to 18,907,729.76, 28,368,742.44 and 7,401,420.33

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Solution

The fourth proportional to 18,907,729.76, 28,368,742.44 and 7,401,420.33 is: 11,104,928.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907,729.76 : 28,368,742.44 = 7,401,420.33 : x
  2. Step 2: Convert to fraction form
    18,907,729.76/28,368,742.44 = 7,401,420.33/x
  3. Step 3: Cross multiply
    18,907,729.76x = 28,368,742.44 × 7,401,420.33
  4. Step 4: Simplify right side
    18,907,729.76x = 209,968,987,031,949.81
  5. Step 5: Solve for x
    x = 209,968,987,031,949.81/18,907,729.76
  6. Step 6: Final answer
    x = 11,104,928.50

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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.