Home / 21,067.60-31,409.69-18,701.01

Finding the Fourth Proportional to 21,067.60, 31,409.69 and 18,701.01

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Solution

The fourth proportional to 21,067.60, 31,409.69 and 18,701.01 is: 27,881.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,067.60 : 31,409.69 = 18,701.01 : x
  2. Step 2: Convert to fraction form
    21,067.60/31,409.69 = 18,701.01/x
  3. Step 3: Cross multiply
    21,067.60x = 31,409.69 × 18,701.01
  4. Step 4: Simplify right side
    21,067.60x = 587,392,926.79
  5. Step 5: Solve for x
    x = 587,392,926.79/21,067.60
  6. Step 6: Final answer
    x = 27,881.34

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.