Home / 12,784.40-19,195.52-7,874.64

Finding the Fourth Proportional to 12,784.40, 19,195.52 and 7,874.64

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Solution

The fourth proportional to 12,784.40, 19,195.52 and 7,874.64 is: 11,823.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,784.40 : 19,195.52 = 7,874.64 : x
  2. Step 2: Convert to fraction form
    12,784.40/19,195.52 = 7,874.64/x
  3. Step 3: Cross multiply
    12,784.40x = 19,195.52 × 7,874.64
  4. Step 4: Simplify right side
    12,784.40x = 151,157,809.61
  5. Step 5: Solve for x
    x = 151,157,809.61/12,784.40
  6. Step 6: Final answer
    x = 11,823.61

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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.