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Finding the Fourth Proportional to 28,393,896.60, 42,590,844.90 and 21,591,451.80

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Solution

The fourth proportional to 28,393,896.60, 42,590,844.90 and 21,591,451.80 is: 32,387,177.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,393,896.60 : 42,590,844.90 = 21,591,451.80 : x
  2. Step 2: Convert to fraction form
    28,393,896.60/42,590,844.90 = 21,591,451.80/x
  3. Step 3: Cross multiply
    28,393,896.60x = 42,590,844.90 × 21,591,451.80
  4. Step 4: Simplify right side
    28,393,896.60x = 919,598,174,779,625.88
  5. Step 5: Solve for x
    x = 919,598,174,779,625.88/28,393,896.60
  6. Step 6: Final answer
    x = 32,387,177.70

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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.