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Finding the Fourth Proportional to 18,968,628.12, 28,453,016.88 and 4,591,672.82

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Solution

The fourth proportional to 18,968,628.12, 28,453,016.88 and 4,591,672.82 is: 6,887,527.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,968,628.12 : 28,453,016.88 = 4,591,672.82 : x
  2. Step 2: Convert to fraction form
    18,968,628.12/28,453,016.88 = 4,591,672.82/x
  3. Step 3: Cross multiply
    18,968,628.12x = 28,453,016.88 × 4,591,672.82
  4. Step 4: Simplify right side
    18,968,628.12x = 130,646,944,254,897.20
  5. Step 5: Solve for x
    x = 130,646,944,254,897.20/18,968,628.12
  6. Step 6: Final answer
    x = 6,887,527.31

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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.