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Finding the Fourth Proportional to 18,456,811.80, 27,685,217.70 and 13,354,978.20

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Solution

The fourth proportional to 18,456,811.80, 27,685,217.70 and 13,354,978.20 is: 20,032,467.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,456,811.80 : 27,685,217.70 = 13,354,978.20 : x
  2. Step 2: Convert to fraction form
    18,456,811.80/27,685,217.70 = 13,354,978.20/x
  3. Step 3: Cross multiply
    18,456,811.80x = 27,685,217.70 × 13,354,978.20
  4. Step 4: Simplify right side
    18,456,811.80x = 369,735,478,845,754.12
  5. Step 5: Solve for x
    x = 369,735,478,845,754.12/18,456,811.80
  6. Step 6: Final answer
    x = 20,032,467.30

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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.