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Finding the Fourth Proportional to 19,392.69, 29,089.14 and 7,705.89

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Solution

The fourth proportional to 19,392.69, 29,089.14 and 7,705.89 is: 11,558.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,392.69 : 29,089.14 = 7,705.89 : x
  2. Step 2: Convert to fraction form
    19,392.69/29,089.14 = 7,705.89/x
  3. Step 3: Cross multiply
    19,392.69x = 29,089.14 × 7,705.89
  4. Step 4: Simplify right side
    19,392.69x = 224,157,713.03
  5. Step 5: Solve for x
    x = 224,157,713.03/19,392.69
  6. Step 6: Final answer
    x = 11,558.88

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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.