Home / 20,621.24-30,928.98-8,779.76

Finding the Fourth Proportional to 20,621.24, 30,928.98 and 8,779.76

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Solution

The fourth proportional to 20,621.24, 30,928.98 and 8,779.76 is: 13,168.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,621.24 : 30,928.98 = 8,779.76 : x
  2. Step 2: Convert to fraction form
    20,621.24/30,928.98 = 8,779.76/x
  3. Step 3: Cross multiply
    20,621.24x = 30,928.98 × 8,779.76
  4. Step 4: Simplify right side
    20,621.24x = 271,549,021.44
  5. Step 5: Solve for x
    x = 271,549,021.44/20,621.24
  6. Step 6: Final answer
    x = 13,168.41

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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.