Home / 21,116.54-29,147.31-12,170.00

Finding the Fourth Proportional to 21,116.54, 29,147.31 and 12,170.00

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Solution

The fourth proportional to 21,116.54, 29,147.31 and 12,170.00 is: 16,798.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,116.54 : 29,147.31 = 12,170.00 : x
  2. Step 2: Convert to fraction form
    21,116.54/29,147.31 = 12,170.00/x
  3. Step 3: Cross multiply
    21,116.54x = 29,147.31 × 12,170.00
  4. Step 4: Simplify right side
    21,116.54x = 354,722,620.27
  5. Step 5: Solve for x
    x = 354,722,620.27/21,116.54
  6. Step 6: Final answer
    x = 16,798.33

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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.