Home / 21,245.40-31,840.38-8,751.18

Finding the Fourth Proportional to 21,245.40, 31,840.38 and 8,751.18

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Solution

The fourth proportional to 21,245.40, 31,840.38 and 8,751.18 is: 13,115.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,245.40 : 31,840.38 = 8,751.18 : x
  2. Step 2: Convert to fraction form
    21,245.40/31,840.38 = 8,751.18/x
  3. Step 3: Cross multiply
    21,245.40x = 31,840.38 × 8,751.18
  4. Step 4: Simplify right side
    21,245.40x = 278,640,896.65
  5. Step 5: Solve for x
    x = 278,640,896.65/21,245.40
  6. Step 6: Final answer
    x = 13,115.35

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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.