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Finding the Fourth Proportional to 18,865, 28,296.54 and 5,717.32

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Solution

The fourth proportional to 18,865, 28,296.54 and 5,717.32 is: 8,575.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,865 : 28,296.54 = 5,717.32 : x
  2. Step 2: Convert to fraction form
    18,865/28,296.54 = 5,717.32/x
  3. Step 3: Cross multiply
    18,865x = 28,296.54 × 5,717.32
  4. Step 4: Simplify right side
    18,865x = 161,780,374.07
  5. Step 5: Solve for x
    x = 161,780,374.07/18,865
  6. Step 6: Final answer
    x = 8,575.69

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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.