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Finding the Fourth Proportional to 18,672,642.88, 28,008,964.32 and 5,902,116.64

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Solution

The fourth proportional to 18,672,642.88, 28,008,964.32 and 5,902,116.64 is: 8,853,174.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672,642.88 : 28,008,964.32 = 5,902,116.64 : x
  2. Step 2: Convert to fraction form
    18,672,642.88/28,008,964.32 = 5,902,116.64/x
  3. Step 3: Cross multiply
    18,672,642.88x = 28,008,964.32 × 5,902,116.64
  4. Step 4: Simplify right side
    18,672,642.88x = 165,312,174,382,238.28
  5. Step 5: Solve for x
    x = 165,312,174,382,238.28/18,672,642.88
  6. Step 6: Final answer
    x = 8,853,174.96

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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.