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Finding the Fourth Proportional to 12,915,662.40, 19,371,938.40 and 5,341,838.40

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Solution

The fourth proportional to 12,915,662.40, 19,371,938.40 and 5,341,838.40 is: 8,012,114.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,915,662.40 : 19,371,938.40 = 5,341,838.40 : x
  2. Step 2: Convert to fraction form
    12,915,662.40/19,371,938.40 = 5,341,838.40/x
  3. Step 3: Cross multiply
    12,915,662.40x = 19,371,938.40 × 5,341,838.40
  4. Step 4: Simplify right side
    12,915,662.40x = 103,481,764,427,554.56
  5. Step 5: Solve for x
    x = 103,481,764,427,554.56/12,915,662.40
  6. Step 6: Final answer
    x = 8,012,114.38

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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.