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Finding the Fourth Proportional to 21,892.40, 30,213.80 and 12,462.92

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Solution

The fourth proportional to 21,892.40, 30,213.80 and 12,462.92 is: 17,200.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,892.40 : 30,213.80 = 12,462.92 : x
  2. Step 2: Convert to fraction form
    21,892.40/30,213.80 = 12,462.92/x
  3. Step 3: Cross multiply
    21,892.40x = 30,213.80 × 12,462.92
  4. Step 4: Simplify right side
    21,892.40x = 376,552,172.30
  5. Step 5: Solve for x
    x = 376,552,172.30/21,892.40
  6. Step 6: Final answer
    x = 17,200.13

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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.