Home / 20,812.62-28,721.44-13,373.58

Finding the Fourth Proportional to 20,812.62, 28,721.44 and 13,373.58

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Solution

The fourth proportional to 20,812.62, 28,721.44 and 13,373.58 is: 18,455.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.62 : 28,721.44 = 13,373.58 : x
  2. Step 2: Convert to fraction form
    20,812.62/28,721.44 = 13,373.58/x
  3. Step 3: Cross multiply
    20,812.62x = 28,721.44 × 13,373.58
  4. Step 4: Simplify right side
    20,812.62x = 384,108,475.56
  5. Step 5: Solve for x
    x = 384,108,475.56/20,812.62
  6. Step 6: Final answer
    x = 18,455.56

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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.