Home / 28,114.78-42,178.53-8,392.60

Finding the Fourth Proportional to 28,114.78, 42,178.53 and 8,392.60

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Solution

The fourth proportional to 28,114.78, 42,178.53 and 8,392.60 is: 12,590.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,114.78 : 42,178.53 = 8,392.60 : x
  2. Step 2: Convert to fraction form
    28,114.78/42,178.53 = 8,392.60/x
  3. Step 3: Cross multiply
    28,114.78x = 42,178.53 × 8,392.60
  4. Step 4: Simplify right side
    28,114.78x = 353,987,530.88
  5. Step 5: Solve for x
    x = 353,987,530.88/28,114.78
  6. Step 6: Final answer
    x = 12,590.80

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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.