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Finding the Fourth Proportional to 18,858.59, 28,287.93 and 5,711.07

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Solution

The fourth proportional to 18,858.59, 28,287.93 and 5,711.07 is: 8,566.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,858.59 : 28,287.93 = 5,711.07 : x
  2. Step 2: Convert to fraction form
    18,858.59/28,287.93 = 5,711.07/x
  3. Step 3: Cross multiply
    18,858.59x = 28,287.93 × 5,711.07
  4. Step 4: Simplify right side
    18,858.59x = 161,554,475.88
  5. Step 5: Solve for x
    x = 161,554,475.88/18,858.59
  6. Step 6: Final answer
    x = 8,566.63

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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.