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Finding the Fourth Proportional to 18,671,640.80, 28,028,456.40 and 14,430,610.40

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Solution

The fourth proportional to 18,671,640.80, 28,028,456.40 and 14,430,610.40 is: 21,662,142.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,671,640.80 : 28,028,456.40 = 14,430,610.40 : x
  2. Step 2: Convert to fraction form
    18,671,640.80/28,028,456.40 = 14,430,610.40/x
  3. Step 3: Cross multiply
    18,671,640.80x = 28,028,456.40 × 14,430,610.40
  4. Step 4: Simplify right side
    18,671,640.80x = 404,467,734,421,786.56
  5. Step 5: Solve for x
    x = 404,467,734,421,786.56/18,671,640.80
  6. Step 6: Final answer
    x = 21,662,142.00

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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.