Home / 21,120.36-29,146.80-12,167.16

Finding the Fourth Proportional to 21,120.36, 29,146.80 and 12,167.16

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Solution

The fourth proportional to 21,120.36, 29,146.80 and 12,167.16 is: 16,791.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,120.36 : 29,146.80 = 12,167.16 : x
  2. Step 2: Convert to fraction form
    21,120.36/29,146.80 = 12,167.16/x
  3. Step 3: Cross multiply
    21,120.36x = 29,146.80 × 12,167.16
  4. Step 4: Simplify right side
    21,120.36x = 354,633,779.09
  5. Step 5: Solve for x
    x = 354,633,779.09/21,120.36
  6. Step 6: Final answer
    x = 16,791.09

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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.