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Finding the Fourth Proportional to 20,347,978.80, 30,521,968.20 and 7,565,838.60

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Solution

The fourth proportional to 20,347,978.80, 30,521,968.20 and 7,565,838.60 is: 11,348,757.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,347,978.80 : 30,521,968.20 = 7,565,838.60 : x
  2. Step 2: Convert to fraction form
    20,347,978.80/30,521,968.20 = 7,565,838.60/x
  3. Step 3: Cross multiply
    20,347,978.80x = 30,521,968.20 × 7,565,838.60
  4. Step 4: Simplify right side
    20,347,978.80x = 230,924,285,155,532.50
  5. Step 5: Solve for x
    x = 230,924,285,155,532.50/20,347,978.80
  6. Step 6: Final answer
    x = 11,348,757.90

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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.