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Finding the Fourth Proportional to 13,751,921.63, 18,978,242.34 and 7,640,350.13

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Solution

The fourth proportional to 13,751,921.63, 18,978,242.34 and 7,640,350.13 is: 10,544,011.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,751,921.63 : 18,978,242.34 = 7,640,350.13 : x
  2. Step 2: Convert to fraction form
    13,751,921.63/18,978,242.34 = 7,640,350.13/x
  3. Step 3: Cross multiply
    13,751,921.63x = 18,978,242.34 × 7,640,350.13
  4. Step 4: Simplify right side
    13,751,921.63x = 145,000,416,234,699.28
  5. Step 5: Solve for x
    x = 145,000,416,234,699.28/13,751,921.63
  6. Step 6: Final answer
    x = 10,544,011.24

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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.