Home / 20,361.78-30,534.30-8,507.70

Finding the Fourth Proportional to 20,361.78, 30,534.30 and 8,507.70

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Solution

The fourth proportional to 20,361.78, 30,534.30 and 8,507.70 is: 12,758.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,361.78 : 30,534.30 = 8,507.70 : x
  2. Step 2: Convert to fraction form
    20,361.78/30,534.30 = 8,507.70/x
  3. Step 3: Cross multiply
    20,361.78x = 30,534.30 × 8,507.70
  4. Step 4: Simplify right side
    20,361.78x = 259,776,664.11
  5. Step 5: Solve for x
    x = 259,776,664.11/20,361.78
  6. Step 6: Final answer
    x = 12,758.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.