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Finding the Fourth Proportional to 12,921,858.40, 19,381,232.40 and 5,348,034.40

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Solution

The fourth proportional to 12,921,858.40, 19,381,232.40 and 5,348,034.40 is: 8,021,407.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,921,858.40 : 19,381,232.40 = 5,348,034.40 : x
  2. Step 2: Convert to fraction form
    12,921,858.40/19,381,232.40 = 5,348,034.40/x
  3. Step 3: Cross multiply
    12,921,858.40x = 19,381,232.40 × 5,348,034.40
  4. Step 4: Simplify right side
    12,921,858.40x = 103,651,497,589,594.56
  5. Step 5: Solve for x
    x = 103,651,497,589,594.56/12,921,858.40
  6. Step 6: Final answer
    x = 8,021,407.94

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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.