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Finding the Fourth Proportional to 21,877.68, 30,191.28 and 11,941.68

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Solution

The fourth proportional to 21,877.68, 30,191.28 and 11,941.68 is: 16,479.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,877.68 : 30,191.28 = 11,941.68 : x
  2. Step 2: Convert to fraction form
    21,877.68/30,191.28 = 11,941.68/x
  3. Step 3: Cross multiply
    21,877.68x = 30,191.28 × 11,941.68
  4. Step 4: Simplify right side
    21,877.68x = 360,534,604.55
  5. Step 5: Solve for x
    x = 360,534,604.55/21,877.68
  6. Step 6: Final answer
    x = 16,479.56

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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.