Home / 20,446.45-28,190.04-13,721.41

Finding the Fourth Proportional to 20,446.45, 28,190.04 and 13,721.41

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Solution

The fourth proportional to 20,446.45, 28,190.04 and 13,721.41 is: 18,918.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,446.45 : 28,190.04 = 13,721.41 : x
  2. Step 2: Convert to fraction form
    20,446.45/28,190.04 = 13,721.41/x
  3. Step 3: Cross multiply
    20,446.45x = 28,190.04 × 13,721.41
  4. Step 4: Simplify right side
    20,446.45x = 386,807,096.76
  5. Step 5: Solve for x
    x = 386,807,096.76/20,446.45
  6. Step 6: Final answer
    x = 18,918.06

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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.