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Finding the Fourth Proportional to 21,959.70, 30,304.13 and 11,887.92

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Solution

The fourth proportional to 21,959.70, 30,304.13 and 11,887.92 is: 16,405.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,959.70 : 30,304.13 = 11,887.92 : x
  2. Step 2: Convert to fraction form
    21,959.70/30,304.13 = 11,887.92/x
  3. Step 3: Cross multiply
    21,959.70x = 30,304.13 × 11,887.92
  4. Step 4: Simplify right side
    21,959.70x = 360,252,967.63
  5. Step 5: Solve for x
    x = 360,252,967.63/21,959.70
  6. Step 6: Final answer
    x = 16,405.19

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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.