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Finding the Fourth Proportional to 12,779.88, 19,187.76 and 6,544.38

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Solution

The fourth proportional to 12,779.88, 19,187.76 and 6,544.38 is: 9,825.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,779.88 : 19,187.76 = 6,544.38 : x
  2. Step 2: Convert to fraction form
    12,779.88/19,187.76 = 6,544.38/x
  3. Step 3: Cross multiply
    12,779.88x = 19,187.76 × 6,544.38
  4. Step 4: Simplify right side
    12,779.88x = 125,571,992.79
  5. Step 5: Solve for x
    x = 125,571,992.79/12,779.88
  6. Step 6: Final answer
    x = 9,825.76

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1.5x scale

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.