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Finding the Fourth Proportional to 18,978,980.56, 28,477,145.84 and 10,330,124.56

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Solution

The fourth proportional to 18,978,980.56, 28,477,145.84 and 10,330,124.56 is: 15,499,908.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,978,980.56 : 28,477,145.84 = 10,330,124.56 : x
  2. Step 2: Convert to fraction form
    18,978,980.56/28,477,145.84 = 10,330,124.56/x
  3. Step 3: Cross multiply
    18,978,980.56x = 28,477,145.84 × 10,330,124.56
  4. Step 4: Simplify right side
    18,978,980.56x = 294,172,463,640,485.81
  5. Step 5: Solve for x
    x = 294,172,463,640,485.81/18,978,980.56
  6. Step 6: Final answer
    x = 15,499,908.58

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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.