Home / 21,759.68-30,031.08-12,331.28

Finding the Fourth Proportional to 21,759.68, 30,031.08 and 12,331.28

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Solution

The fourth proportional to 21,759.68, 30,031.08 and 12,331.28 is: 17,018.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,759.68 : 30,031.08 = 12,331.28 : x
  2. Step 2: Convert to fraction form
    21,759.68/30,031.08 = 12,331.28/x
  3. Step 3: Cross multiply
    21,759.68x = 30,031.08 × 12,331.28
  4. Step 4: Simplify right side
    21,759.68x = 370,321,656.18
  5. Step 5: Solve for x
    x = 370,321,656.18/21,759.68
  6. Step 6: Final answer
    x = 17,018.71

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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.