Home / 21,172.88-31,865.68-15,935.04

Finding the Fourth Proportional to 21,172.88, 31,865.68 and 15,935.04

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Solution

The fourth proportional to 21,172.88, 31,865.68 and 15,935.04 is: 23,982.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172.88 : 31,865.68 = 15,935.04 : x
  2. Step 2: Convert to fraction form
    21,172.88/31,865.68 = 15,935.04/x
  3. Step 3: Cross multiply
    21,172.88x = 31,865.68 × 15,935.04
  4. Step 4: Simplify right side
    21,172.88x = 507,780,885.43
  5. Step 5: Solve for x
    x = 507,780,885.43/21,172.88
  6. Step 6: Final answer
    x = 23,982.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.