Home / 21,959.60-30,304.03-11,887.78

Finding the Fourth Proportional to 21,959.60, 30,304.03 and 11,887.78

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Solution

The fourth proportional to 21,959.60, 30,304.03 and 11,887.78 is: 16,405.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,959.60 : 30,304.03 = 11,887.78 : x
  2. Step 2: Convert to fraction form
    21,959.60/30,304.03 = 11,887.78/x
  3. Step 3: Cross multiply
    21,959.60x = 30,304.03 × 11,887.78
  4. Step 4: Simplify right side
    21,959.60x = 360,247,565.99
  5. Step 5: Solve for x
    x = 360,247,565.99/21,959.60
  6. Step 6: Final answer
    x = 16,405.02

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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.