Home / 20,989.24-28,955.94-13,809.92

Finding the Fourth Proportional to 20,989.24, 28,955.94 and 13,809.92

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Solution

The fourth proportional to 20,989.24, 28,955.94 and 13,809.92 is: 19,051.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.24 : 28,955.94 = 13,809.92 : x
  2. Step 2: Convert to fraction form
    20,989.24/28,955.94 = 13,809.92/x
  3. Step 3: Cross multiply
    20,989.24x = 28,955.94 × 13,809.92
  4. Step 4: Simplify right side
    20,989.24x = 399,879,214.92
  5. Step 5: Solve for x
    x = 399,879,214.92/20,989.24
  6. Step 6: Final answer
    x = 19,051.63

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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.