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Finding the Fourth Proportional to 12,779.76, 19,169.76 and 4,014.48

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Solution

The fourth proportional to 12,779.76, 19,169.76 and 4,014.48 is: 6,021.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,779.76 : 19,169.76 = 4,014.48 : x
  2. Step 2: Convert to fraction form
    12,779.76/19,169.76 = 4,014.48/x
  3. Step 3: Cross multiply
    12,779.76x = 19,169.76 × 4,014.48
  4. Step 4: Simplify right side
    12,779.76x = 76,956,618.12
  5. Step 5: Solve for x
    x = 76,956,618.12/12,779.76
  6. Step 6: Final answer
    x = 6,021.76

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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.