Home / 21,959.57-30,291.86-13,890.72

Finding the Fourth Proportional to 21,959.57, 30,291.86 and 13,890.72

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Solution

The fourth proportional to 21,959.57, 30,291.86 and 13,890.72 is: 19,161.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,959.57 : 30,291.86 = 13,890.72 : x
  2. Step 2: Convert to fraction form
    21,959.57/30,291.86 = 13,890.72/x
  3. Step 3: Cross multiply
    21,959.57x = 30,291.86 × 13,890.72
  4. Step 4: Simplify right side
    21,959.57x = 420,775,676.09
  5. Step 5: Solve for x
    x = 420,775,676.09/21,959.57
  6. Step 6: Final answer
    x = 19,161.38

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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.