Home / 21,180.84-31,771.26-8,698.74

Finding the Fourth Proportional to 21,180.84, 31,771.26 and 8,698.74

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Solution

The fourth proportional to 21,180.84, 31,771.26 and 8,698.74 is: 13,048.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,180.84 : 31,771.26 = 8,698.74 : x
  2. Step 2: Convert to fraction form
    21,180.84/31,771.26 = 8,698.74/x
  3. Step 3: Cross multiply
    21,180.84x = 31,771.26 × 8,698.74
  4. Step 4: Simplify right side
    21,180.84x = 276,369,930.21
  5. Step 5: Solve for x
    x = 276,369,930.21/21,180.84
  6. Step 6: Final answer
    x = 13,048.11

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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.