Home / 20,815.02-28,716.66-13,259.99

Finding the Fourth Proportional to 20,815.02, 28,716.66 and 13,259.99

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Solution

The fourth proportional to 20,815.02, 28,716.66 and 13,259.99 is: 18,293.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,815.02 : 28,716.66 = 13,259.99 : x
  2. Step 2: Convert to fraction form
    20,815.02/28,716.66 = 13,259.99/x
  3. Step 3: Cross multiply
    20,815.02x = 28,716.66 × 13,259.99
  4. Step 4: Simplify right side
    20,815.02x = 380,782,696.23
  5. Step 5: Solve for x
    x = 380,782,696.23/20,815.02
  6. Step 6: Final answer
    x = 18,293.65

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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.