Home / 21,850.58-30,156.36-12,420.56

Finding the Fourth Proportional to 21,850.58, 30,156.36 and 12,420.56

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Solution

The fourth proportional to 21,850.58, 30,156.36 and 12,420.56 is: 17,141.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,850.58 : 30,156.36 = 12,420.56 : x
  2. Step 2: Convert to fraction form
    21,850.58/30,156.36 = 12,420.56/x
  3. Step 3: Cross multiply
    21,850.58x = 30,156.36 × 12,420.56
  4. Step 4: Simplify right side
    21,850.58x = 374,558,878.76
  5. Step 5: Solve for x
    x = 374,558,878.76/21,850.58
  6. Step 6: Final answer
    x = 17,141.83

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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.