Home / 21,959.64-30,304.40-11,888.09

Finding the Fourth Proportional to 21,959.64, 30,304.40 and 11,888.09

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Solution

The fourth proportional to 21,959.64, 30,304.40 and 11,888.09 is: 16,405.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,959.64 : 30,304.40 = 11,888.09 : x
  2. Step 2: Convert to fraction form
    21,959.64/30,304.40 = 11,888.09/x
  3. Step 3: Cross multiply
    21,959.64x = 30,304.40 × 11,888.09
  4. Step 4: Simplify right side
    21,959.64x = 360,261,434.60
  5. Step 5: Solve for x
    x = 360,261,434.60/21,959.64
  6. Step 6: Final answer
    x = 16,405.62

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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.