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Finding the Fourth Proportional to 20,244,978.70, 30,343,848.45 and 8,108,440.90

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Solution

The fourth proportional to 20,244,978.70, 30,343,848.45 and 8,108,440.90 is: 12,153,201.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,244,978.70 : 30,343,848.45 = 8,108,440.90 : x
  2. Step 2: Convert to fraction form
    20,244,978.70/30,343,848.45 = 8,108,440.90/x
  3. Step 3: Cross multiply
    20,244,978.70x = 30,343,848.45 × 8,108,440.90
  4. Step 4: Simplify right side
    20,244,978.70x = 246,041,301,835,381.62
  5. Step 5: Solve for x
    x = 246,041,301,835,381.62/20,244,978.70
  6. Step 6: Final answer
    x = 12,153,201.32

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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.