Home / 21,995.75-30,344.67-13,038.45

Finding the Fourth Proportional to 21,995.75, 30,344.67 and 13,038.45

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Solution

The fourth proportional to 21,995.75, 30,344.67 and 13,038.45 is: 17,987.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,995.75 : 30,344.67 = 13,038.45 : x
  2. Step 2: Convert to fraction form
    21,995.75/30,344.67 = 13,038.45/x
  3. Step 3: Cross multiply
    21,995.75x = 30,344.67 × 13,038.45
  4. Step 4: Simplify right side
    21,995.75x = 395,647,462.56
  5. Step 5: Solve for x
    x = 395,647,462.56/21,995.75
  6. Step 6: Final answer
    x = 17,987.45

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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.