Home / 28,651.06-42,975.69-7,874.38

Finding the Fourth Proportional to 28,651.06, 42,975.69 and 7,874.38

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Solution

The fourth proportional to 28,651.06, 42,975.69 and 7,874.38 is: 11,811.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,651.06 : 42,975.69 = 7,874.38 : x
  2. Step 2: Convert to fraction form
    28,651.06/42,975.69 = 7,874.38/x
  3. Step 3: Cross multiply
    28,651.06x = 42,975.69 × 7,874.38
  4. Step 4: Simplify right side
    28,651.06x = 338,406,913.82
  5. Step 5: Solve for x
    x = 338,406,913.82/28,651.06
  6. Step 6: Final answer
    x = 11,811.32

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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.