Home / 21,988.26-30,343.41-12,555.54

Finding the Fourth Proportional to 21,988.26, 30,343.41 and 12,555.54

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Solution

The fourth proportional to 21,988.26, 30,343.41 and 12,555.54 is: 17,326.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,988.26 : 30,343.41 = 12,555.54 : x
  2. Step 2: Convert to fraction form
    21,988.26/30,343.41 = 12,555.54/x
  3. Step 3: Cross multiply
    21,988.26x = 30,343.41 × 12,555.54
  4. Step 4: Simplify right side
    21,988.26x = 380,977,897.99
  5. Step 5: Solve for x
    x = 380,977,897.99/21,988.26
  6. Step 6: Final answer
    x = 17,326.42

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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.