Home / 21,080.74-29,092.54-12,129.60

Finding the Fourth Proportional to 21,080.74, 29,092.54 and 12,129.60

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Solution

The fourth proportional to 21,080.74, 29,092.54 and 12,129.60 is: 16,739.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,080.74 : 29,092.54 = 12,129.60 : x
  2. Step 2: Convert to fraction form
    21,080.74/29,092.54 = 12,129.60/x
  3. Step 3: Cross multiply
    21,080.74x = 29,092.54 × 12,129.60
  4. Step 4: Simplify right side
    21,080.74x = 352,880,842.86
  5. Step 5: Solve for x
    x = 352,880,842.86/21,080.74
  6. Step 6: Final answer
    x = 16,739.49

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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.