Home / 20,218,728.70-30,328,093.05-12,565,978.30

Finding the Fourth Proportional to 20,218,728.70, 30,328,093.05 and 12,565,978.30

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Solution

The fourth proportional to 20,218,728.70, 30,328,093.05 and 12,565,978.30 is: 18,848,967.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,218,728.70 : 30,328,093.05 = 12,565,978.30 : x
  2. Step 2: Convert to fraction form
    20,218,728.70/30,328,093.05 = 12,565,978.30/x
  3. Step 3: Cross multiply
    20,218,728.70x = 30,328,093.05 × 12,565,978.30
  4. Step 4: Simplify right side
    20,218,728.70x = 381,102,159,146,680.88
  5. Step 5: Solve for x
    x = 381,102,159,146,680.88/20,218,728.70
  6. Step 6: Final answer
    x = 18,848,967.45

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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.