Home / 21,317.04-31,980.96-8,170.56

Finding the Fourth Proportional to 21,317.04, 31,980.96 and 8,170.56

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Solution

The fourth proportional to 21,317.04, 31,980.96 and 8,170.56 is: 12,257.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,317.04 : 31,980.96 = 8,170.56 : x
  2. Step 2: Convert to fraction form
    21,317.04/31,980.96 = 8,170.56/x
  3. Step 3: Cross multiply
    21,317.04x = 31,980.96 × 8,170.56
  4. Step 4: Simplify right side
    21,317.04x = 261,302,352.54
  5. Step 5: Solve for x
    x = 261,302,352.54/21,317.04
  6. Step 6: Final answer
    x = 12,257.91

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1.5x scale

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.