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Finding the Fourth Proportional to 11,988,435.79, 17,978,189.47 and 4,309,985.40

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Solution

The fourth proportional to 11,988,435.79, 17,978,189.47 and 4,309,985.40 is: 6,463,373.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,988,435.79 : 17,978,189.47 = 4,309,985.40 : x
  2. Step 2: Convert to fraction form
    11,988,435.79/17,978,189.47 = 4,309,985.40/x
  3. Step 3: Cross multiply
    11,988,435.79x = 17,978,189.47 × 4,309,985.40
  4. Step 4: Simplify right side
    11,988,435.79x = 77,485,734,112,583.81
  5. Step 5: Solve for x
    x = 77,485,734,112,583.81/11,988,435.79
  6. Step 6: Final answer
    x = 6,463,373.16

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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.