Home / 28,116.78-42,181.53-8,394.60

Finding the Fourth Proportional to 28,116.78, 42,181.53 and 8,394.60

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Solution

The fourth proportional to 28,116.78, 42,181.53 and 8,394.60 is: 12,593.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,116.78 : 42,181.53 = 8,394.60 : x
  2. Step 2: Convert to fraction form
    28,116.78/42,181.53 = 8,394.60/x
  3. Step 3: Cross multiply
    28,116.78x = 42,181.53 × 8,394.60
  4. Step 4: Simplify right side
    28,116.78x = 354,097,071.74
  5. Step 5: Solve for x
    x = 354,097,071.74/28,116.78
  6. Step 6: Final answer
    x = 12,593.80

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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.