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Finding the Fourth Proportional to 12,658,981.20, 18,988,990.20 and 3,683,533.20

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Solution

The fourth proportional to 12,658,981.20, 18,988,990.20 and 3,683,533.20 is: 5,525,450.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,658,981.20 : 18,988,990.20 = 3,683,533.20 : x
  2. Step 2: Convert to fraction form
    12,658,981.20/18,988,990.20 = 3,683,533.20/x
  3. Step 3: Cross multiply
    12,658,981.20x = 18,988,990.20 × 3,683,533.20
  4. Step 4: Simplify right side
    12,658,981.20x = 69,946,575,836,174.64
  5. Step 5: Solve for x
    x = 69,946,575,836,174.64/12,658,981.20
  6. Step 6: Final answer
    x = 5,525,450.64

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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.