Home / 20,921.44-31,384.13-6,881.58

Finding the Fourth Proportional to 20,921.44, 31,384.13 and 6,881.58

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Solution

The fourth proportional to 20,921.44, 31,384.13 and 6,881.58 is: 10,323.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,921.44 : 31,384.13 = 6,881.58 : x
  2. Step 2: Convert to fraction form
    20,921.44/31,384.13 = 6,881.58/x
  3. Step 3: Cross multiply
    20,921.44x = 31,384.13 × 6,881.58
  4. Step 4: Simplify right side
    20,921.44x = 215,972,210.00
  5. Step 5: Solve for x
    x = 215,972,210.00/20,921.44
  6. Step 6: Final answer
    x = 10,323.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.