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Finding the Fourth Proportional to 21,893.10, 30,211.22 and 12,941.46

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Solution

The fourth proportional to 21,893.10, 30,211.22 and 12,941.46 is: 17,858.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,893.10 : 30,211.22 = 12,941.46 : x
  2. Step 2: Convert to fraction form
    21,893.10/30,211.22 = 12,941.46/x
  3. Step 3: Cross multiply
    21,893.10x = 30,211.22 × 12,941.46
  4. Step 4: Simplify right side
    21,893.10x = 390,977,230.47
  5. Step 5: Solve for x
    x = 390,977,230.47/21,893.10
  6. Step 6: Final answer
    x = 17,858.47

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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.