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Finding the Fourth Proportional to 12,779.51, 19,174.03 and 5,757.42

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Solution

The fourth proportional to 12,779.51, 19,174.03 and 5,757.42 is: 8,638.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,779.51 : 19,174.03 = 5,757.42 : x
  2. Step 2: Convert to fraction form
    12,779.51/19,174.03 = 5,757.42/x
  3. Step 3: Cross multiply
    12,779.51x = 19,174.03 × 5,757.42
  4. Step 4: Simplify right side
    12,779.51x = 110,392,929.41
  5. Step 5: Solve for x
    x = 110,392,929.41/12,779.51
  6. Step 6: Final answer
    x = 8,638.27

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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.