Home / 21,957.31-30,301.09-11,885.72

Finding the Fourth Proportional to 21,957.31, 30,301.09 and 11,885.72

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Solution

The fourth proportional to 21,957.31, 30,301.09 and 11,885.72 is: 16,402.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,957.31 : 30,301.09 = 11,885.72 : x
  2. Step 2: Convert to fraction form
    21,957.31/30,301.09 = 11,885.72/x
  3. Step 3: Cross multiply
    21,957.31x = 30,301.09 × 11,885.72
  4. Step 4: Simplify right side
    21,957.31x = 360,150,119.93
  5. Step 5: Solve for x
    x = 360,150,119.93/21,957.31
  6. Step 6: Final answer
    x = 16,402.29

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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.