Home / 21,186.81-31,767.77-8,040.11

Finding the Fourth Proportional to 21,186.81, 31,767.77 and 8,040.11

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Solution

The fourth proportional to 21,186.81, 31,767.77 and 8,040.11 is: 12,055.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,186.81 : 31,767.77 = 8,040.11 : x
  2. Step 2: Convert to fraction form
    21,186.81/31,767.77 = 8,040.11/x
  3. Step 3: Cross multiply
    21,186.81x = 31,767.77 × 8,040.11
  4. Step 4: Simplify right side
    21,186.81x = 255,416,166.22
  5. Step 5: Solve for x
    x = 255,416,166.22/21,186.81
  6. Step 6: Final answer
    x = 12,055.43

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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.