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Finding the Fourth Proportional to 18,321,978.40, 27,493,465.20 and 6,970,573.60

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Solution

The fourth proportional to 18,321,978.40, 27,493,465.20 and 6,970,573.60 is: 10,459,854.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,321,978.40 : 27,493,465.20 = 6,970,573.60 : x
  2. Step 2: Convert to fraction form
    18,321,978.40/27,493,465.20 = 6,970,573.60/x
  3. Step 3: Cross multiply
    18,321,978.40x = 27,493,465.20 × 6,970,573.60
  4. Step 4: Simplify right side
    18,321,978.40x = 191,645,222,695,638.72
  5. Step 5: Solve for x
    x = 191,645,222,695,638.72/18,321,978.40
  6. Step 6: Final answer
    x = 10,459,854.20

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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.