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Finding the Fourth Proportional to 15,999.80, 22,081.69 and 9,629.71

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Solution

The fourth proportional to 15,999.80, 22,081.69 and 9,629.71 is: 13,290.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,999.80 : 22,081.69 = 9,629.71 : x
  2. Step 2: Convert to fraction form
    15,999.80/22,081.69 = 9,629.71/x
  3. Step 3: Cross multiply
    15,999.80x = 22,081.69 × 9,629.71
  4. Step 4: Simplify right side
    15,999.80x = 212,640,323.80
  5. Step 5: Solve for x
    x = 212,640,323.80/15,999.80
  6. Step 6: Final answer
    x = 13,290.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.