Home / 20,835.87-28,749.06-12,340.65

Finding the Fourth Proportional to 20,835.87, 28,749.06 and 12,340.65

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Solution

The fourth proportional to 20,835.87, 28,749.06 and 12,340.65 is: 17,027.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,835.87 : 28,749.06 = 12,340.65 : x
  2. Step 2: Convert to fraction form
    20,835.87/28,749.06 = 12,340.65/x
  3. Step 3: Cross multiply
    20,835.87x = 28,749.06 × 12,340.65
  4. Step 4: Simplify right side
    20,835.87x = 354,782,195.10
  5. Step 5: Solve for x
    x = 354,782,195.10/20,835.87
  6. Step 6: Final answer
    x = 17,027.48

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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.