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Finding the Fourth Proportional to 12,929,198.40, 19,392,242.40 and 5,355,374.40

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Solution

The fourth proportional to 12,929,198.40, 19,392,242.40 and 5,355,374.40 is: 8,032,417.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,929,198.40 : 19,392,242.40 = 5,355,374.40 : x
  2. Step 2: Convert to fraction form
    12,929,198.40/19,392,242.40 = 5,355,374.40/x
  3. Step 3: Cross multiply
    12,929,198.40x = 19,392,242.40 × 5,355,374.40
  4. Step 4: Simplify right side
    12,929,198.40x = 103,852,718,507,554.56
  5. Step 5: Solve for x
    x = 103,852,718,507,554.56/12,929,198.40
  6. Step 6: Final answer
    x = 8,032,417.42

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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.