Home / 21,983.35-30,312.49-15,921.60

Finding the Fourth Proportional to 21,983.35, 30,312.49 and 15,921.60

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Solution

The fourth proportional to 21,983.35, 30,312.49 and 15,921.60 is: 21,954.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,983.35 : 30,312.49 = 15,921.60 : x
  2. Step 2: Convert to fraction form
    21,983.35/30,312.49 = 15,921.60/x
  3. Step 3: Cross multiply
    21,983.35x = 30,312.49 × 15,921.60
  4. Step 4: Simplify right side
    21,983.35x = 482,623,300.98
  5. Step 5: Solve for x
    x = 482,623,300.98/21,983.35
  6. Step 6: Final answer
    x = 21,954.04

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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.