Home / 21,081.70-29,091.96-12,130.59

Finding the Fourth Proportional to 21,081.70, 29,091.96 and 12,130.59

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Solution

The fourth proportional to 21,081.70, 29,091.96 and 12,130.59 is: 16,739.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,081.70 : 29,091.96 = 12,130.59 : x
  2. Step 2: Convert to fraction form
    21,081.70/29,091.96 = 12,130.59/x
  3. Step 3: Cross multiply
    21,081.70x = 29,091.96 × 12,130.59
  4. Step 4: Simplify right side
    21,081.70x = 352,902,639.06
  5. Step 5: Solve for x
    x = 352,902,639.06/21,081.70
  6. Step 6: Final answer
    x = 16,739.76

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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.