Home / 21,081.26-29,095.06-12,128.60

Finding the Fourth Proportional to 21,081.26, 29,095.06 and 12,128.60

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Solution

The fourth proportional to 21,081.26, 29,095.06 and 12,128.60 is: 16,739.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,081.26 : 29,095.06 = 12,128.60 : x
  2. Step 2: Convert to fraction form
    21,081.26/29,095.06 = 12,128.60/x
  3. Step 3: Cross multiply
    21,081.26x = 29,095.06 × 12,128.60
  4. Step 4: Simplify right side
    21,081.26x = 352,882,344.72
  5. Step 5: Solve for x
    x = 352,882,344.72/21,081.26
  6. Step 6: Final answer
    x = 16,739.15

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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.