Home / 20,918.14-28,847.75-14,213.77

Finding the Fourth Proportional to 20,918.14, 28,847.75 and 14,213.77

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Solution

The fourth proportional to 20,918.14, 28,847.75 and 14,213.77 is: 19,601.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.14 : 28,847.75 = 14,213.77 : x
  2. Step 2: Convert to fraction form
    20,918.14/28,847.75 = 14,213.77/x
  3. Step 3: Cross multiply
    20,918.14x = 28,847.75 × 14,213.77
  4. Step 4: Simplify right side
    20,918.14x = 410,035,140.33
  5. Step 5: Solve for x
    x = 410,035,140.33/20,918.14
  6. Step 6: Final answer
    x = 19,601.90

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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.