Home / 21,387.51-29,512.18-11,826.09

Finding the Fourth Proportional to 21,387.51, 29,512.18 and 11,826.09

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Solution

The fourth proportional to 21,387.51, 29,512.18 and 11,826.09 is: 16,318.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,387.51 : 29,512.18 = 11,826.09 : x
  2. Step 2: Convert to fraction form
    21,387.51/29,512.18 = 11,826.09/x
  3. Step 3: Cross multiply
    21,387.51x = 29,512.18 × 11,826.09
  4. Step 4: Simplify right side
    21,387.51x = 349,013,696.78
  5. Step 5: Solve for x
    x = 349,013,696.78/21,387.51
  6. Step 6: Final answer
    x = 16,318.58

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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.