Home / 13,779.20-20,658.40-7,108.54

Finding the Fourth Proportional to 13,779.20, 20,658.40 and 7,108.54

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Solution

The fourth proportional to 13,779.20, 20,658.40 and 7,108.54 is: 10,657.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.20 : 20,658.40 = 7,108.54 : x
  2. Step 2: Convert to fraction form
    13,779.20/20,658.40 = 7,108.54/x
  3. Step 3: Cross multiply
    13,779.20x = 20,658.40 × 7,108.54
  4. Step 4: Simplify right side
    13,779.20x = 146,850,993.32
  5. Step 5: Solve for x
    x = 146,850,993.32/13,779.20
  6. Step 6: Final answer
    x = 10,657.44

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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.