Home / 18,978.47-28,467.74-5,830.75

Finding the Fourth Proportional to 18,978.47, 28,467.74 and 5,830.75

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Solution

The fourth proportional to 18,978.47, 28,467.74 and 5,830.75 is: 8,746.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,978.47 : 28,467.74 = 5,830.75 : x
  2. Step 2: Convert to fraction form
    18,978.47/28,467.74 = 5,830.75/x
  3. Step 3: Cross multiply
    18,978.47x = 28,467.74 × 5,830.75
  4. Step 4: Simplify right side
    18,978.47x = 165,988,174.68
  5. Step 5: Solve for x
    x = 165,988,174.68/18,978.47
  6. Step 6: Final answer
    x = 8,746.13

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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.