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Finding the Fourth Proportional to 19,316.07, 28,978.56 and 6,168.42

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Solution

The fourth proportional to 19,316.07, 28,978.56 and 6,168.42 is: 9,254.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,316.07 : 28,978.56 = 6,168.42 : x
  2. Step 2: Convert to fraction form
    19,316.07/28,978.56 = 6,168.42/x
  3. Step 3: Cross multiply
    19,316.07x = 28,978.56 × 6,168.42
  4. Step 4: Simplify right side
    19,316.07x = 178,751,929.08
  5. Step 5: Solve for x
    x = 178,751,929.08/19,316.07
  6. Step 6: Final answer
    x = 9,254.05

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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.