Home / 20,280.22-30,419.58-9,186.86

Finding the Fourth Proportional to 20,280.22, 30,419.58 and 9,186.86

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Solution

The fourth proportional to 20,280.22, 30,419.58 and 9,186.86 is: 13,779.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.22 : 30,419.58 = 9,186.86 : x
  2. Step 2: Convert to fraction form
    20,280.22/30,419.58 = 9,186.86/x
  3. Step 3: Cross multiply
    20,280.22x = 30,419.58 × 9,186.86
  4. Step 4: Simplify right side
    20,280.22x = 279,460,422.72
  5. Step 5: Solve for x
    x = 279,460,422.72/20,280.22
  6. Step 6: Final answer
    x = 13,779.95

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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.