Home / 20,943.60-28,898.68-13,879.60

Finding the Fourth Proportional to 20,943.60, 28,898.68 and 13,879.60

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Solution

The fourth proportional to 20,943.60, 28,898.68 and 13,879.60 is: 19,151.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,943.60 : 28,898.68 = 13,879.60 : x
  2. Step 2: Convert to fraction form
    20,943.60/28,898.68 = 13,879.60/x
  3. Step 3: Cross multiply
    20,943.60x = 28,898.68 × 13,879.60
  4. Step 4: Simplify right side
    20,943.60x = 401,102,118.93
  5. Step 5: Solve for x
    x = 401,102,118.93/20,943.60
  6. Step 6: Final answer
    x = 19,151.54

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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.