Home / 20,783.65-31,180.09-5,991.41

Finding the Fourth Proportional to 20,783.65, 31,180.09 and 5,991.41

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Solution

The fourth proportional to 20,783.65, 31,180.09 and 5,991.41 is: 8,988.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,783.65 : 31,180.09 = 5,991.41 : x
  2. Step 2: Convert to fraction form
    20,783.65/31,180.09 = 5,991.41/x
  3. Step 3: Cross multiply
    20,783.65x = 31,180.09 × 5,991.41
  4. Step 4: Simplify right side
    20,783.65x = 186,812,760.38
  5. Step 5: Solve for x
    x = 186,812,760.38/20,783.65
  6. Step 6: Final answer
    x = 8,988.45

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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.