Home / 21,184.74-31,771.74-8,708.21

Finding the Fourth Proportional to 21,184.74, 31,771.74 and 8,708.21

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Solution

The fourth proportional to 21,184.74, 31,771.74 and 8,708.21 is: 13,060.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,184.74 : 31,771.74 = 8,708.21 : x
  2. Step 2: Convert to fraction form
    21,184.74/31,771.74 = 8,708.21/x
  3. Step 3: Cross multiply
    21,184.74x = 31,771.74 × 8,708.21
  4. Step 4: Simplify right side
    21,184.74x = 276,674,976.93
  5. Step 5: Solve for x
    x = 276,674,976.93/21,184.74
  6. Step 6: Final answer
    x = 13,060.11

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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.