Home / 21,081.60-29,091.60-11,651.04

Finding the Fourth Proportional to 21,081.60, 29,091.60 and 11,651.04

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Solution

The fourth proportional to 21,081.60, 29,091.60 and 11,651.04 is: 16,077.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,081.60 : 29,091.60 = 11,651.04 : x
  2. Step 2: Convert to fraction form
    21,081.60/29,091.60 = 11,651.04/x
  3. Step 3: Cross multiply
    21,081.60x = 29,091.60 × 11,651.04
  4. Step 4: Simplify right side
    21,081.60x = 338,947,395.26
  5. Step 5: Solve for x
    x = 338,947,395.26/21,081.60
  6. Step 6: Final answer
    x = 16,077.88

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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.