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Finding the Fourth Proportional to 12,779.51, 19,163.19 and 4,458.52

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Solution

The fourth proportional to 12,779.51, 19,163.19 and 4,458.52 is: 6,685.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,779.51 : 19,163.19 = 4,458.52 : x
  2. Step 2: Convert to fraction form
    12,779.51/19,163.19 = 4,458.52/x
  3. Step 3: Cross multiply
    12,779.51x = 19,163.19 × 4,458.52
  4. Step 4: Simplify right side
    12,779.51x = 85,439,465.88
  5. Step 5: Solve for x
    x = 85,439,465.88/12,779.51
  6. Step 6: Final answer
    x = 6,685.66

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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.