Home / 20,388.71-28,093.28-18,986.19

Finding the Fourth Proportional to 20,388.71, 28,093.28 and 18,986.19

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Solution

The fourth proportional to 20,388.71, 28,093.28 and 18,986.19 is: 26,160.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,388.71 : 28,093.28 = 18,986.19 : x
  2. Step 2: Convert to fraction form
    20,388.71/28,093.28 = 18,986.19/x
  3. Step 3: Cross multiply
    20,388.71x = 28,093.28 × 18,986.19
  4. Step 4: Simplify right side
    20,388.71x = 533,384,256.87
  5. Step 5: Solve for x
    x = 533,384,256.87/20,388.71
  6. Step 6: Final answer
    x = 26,160.77

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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.