Home / 21,156.80-31,735.26-8,674.70

Finding the Fourth Proportional to 21,156.80, 31,735.26 and 8,674.70

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Solution

The fourth proportional to 21,156.80, 31,735.26 and 8,674.70 is: 13,012.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,156.80 : 31,735.26 = 8,674.70 : x
  2. Step 2: Convert to fraction form
    21,156.80/31,735.26 = 8,674.70/x
  3. Step 3: Cross multiply
    21,156.80x = 31,735.26 × 8,674.70
  4. Step 4: Simplify right side
    21,156.80x = 275,293,701.25
  5. Step 5: Solve for x
    x = 275,293,701.25/21,156.80
  6. Step 6: Final answer
    x = 13,012.07

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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.