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Finding the Fourth Proportional to 20,796,288.86, 28,696,378.02 and 11,978,608.00

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Solution

The fourth proportional to 20,796,288.86, 28,696,378.02 and 11,978,608.00 is: 16,529,038.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,796,288.86 : 28,696,378.02 = 11,978,608.00 : x
  2. Step 2: Convert to fraction form
    20,796,288.86/28,696,378.02 = 11,978,608.00/x
  3. Step 3: Cross multiply
    20,796,288.86x = 28,696,378.02 × 11,978,608.00
  4. Step 4: Simplify right side
    20,796,288.86x = 343,742,663,325,908.88
  5. Step 5: Solve for x
    x = 343,742,663,325,908.88/20,796,288.86
  6. Step 6: Final answer
    x = 16,529,038.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.