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Finding the Fourth Proportional to 21,885.01, 30,201.32 and 12,453.57

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Solution

The fourth proportional to 21,885.01, 30,201.32 and 12,453.57 is: 17,185.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,885.01 : 30,201.32 = 12,453.57 : x
  2. Step 2: Convert to fraction form
    21,885.01/30,201.32 = 12,453.57/x
  3. Step 3: Cross multiply
    21,885.01x = 30,201.32 × 12,453.57
  4. Step 4: Simplify right side
    21,885.01x = 376,114,283.85
  5. Step 5: Solve for x
    x = 376,114,283.85/21,885.01
  6. Step 6: Final answer
    x = 17,185.93

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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.