Home / 21,189.81-31,786.24-5,607.25

Finding the Fourth Proportional to 21,189.81, 31,786.24 and 5,607.25

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Solution

The fourth proportional to 21,189.81, 31,786.24 and 5,607.25 is: 8,411.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,189.81 : 31,786.24 = 5,607.25 : x
  2. Step 2: Convert to fraction form
    21,189.81/31,786.24 = 5,607.25/x
  3. Step 3: Cross multiply
    21,189.81x = 31,786.24 × 5,607.25
  4. Step 4: Simplify right side
    21,189.81x = 178,233,366.20
  5. Step 5: Solve for x
    x = 178,233,366.20/21,189.81
  6. Step 6: Final answer
    x = 8,411.28

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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.