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Finding the Fourth Proportional to 38,994.98, 53,812.89 and 21,089.99

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Solution

The fourth proportional to 38,994.98, 53,812.89 and 21,089.99 is: 29,104.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,994.98 : 53,812.89 = 21,089.99 : x
  2. Step 2: Convert to fraction form
    38,994.98/53,812.89 = 21,089.99/x
  3. Step 3: Cross multiply
    38,994.98x = 53,812.89 × 21,089.99
  4. Step 4: Simplify right side
    38,994.98x = 1,134,913,446.50
  5. Step 5: Solve for x
    x = 1,134,913,446.50/38,994.98
  6. Step 6: Final answer
    x = 29,104.09

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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.