Home / 20,464.92-28,239.30-11,515.50

Finding the Fourth Proportional to 20,464.92, 28,239.30 and 11,515.50

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Solution

The fourth proportional to 20,464.92, 28,239.30 and 11,515.50 is: 15,890.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,464.92 : 28,239.30 = 11,515.50 : x
  2. Step 2: Convert to fraction form
    20,464.92/28,239.30 = 11,515.50/x
  3. Step 3: Cross multiply
    20,464.92x = 28,239.30 × 11,515.50
  4. Step 4: Simplify right side
    20,464.92x = 325,189,659.15
  5. Step 5: Solve for x
    x = 325,189,659.15/20,464.92
  6. Step 6: Final answer
    x = 15,890.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.