Home / 21,987.98-30,344.88-12,424.54

Finding the Fourth Proportional to 21,987.98, 30,344.88 and 12,424.54

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Solution

The fourth proportional to 21,987.98, 30,344.88 and 12,424.54 is: 17,146.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,987.98 : 30,344.88 = 12,424.54 : x
  2. Step 2: Convert to fraction form
    21,987.98/30,344.88 = 12,424.54/x
  3. Step 3: Cross multiply
    21,987.98x = 30,344.88 × 12,424.54
  4. Step 4: Simplify right side
    21,987.98x = 377,021,175.36
  5. Step 5: Solve for x
    x = 377,021,175.36/21,987.98
  6. Step 6: Final answer
    x = 17,146.69

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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.