Home / 21,638.22-29,840.04-13,141.73

Finding the Fourth Proportional to 21,638.22, 29,840.04 and 13,141.73

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Solution

The fourth proportional to 21,638.22, 29,840.04 and 13,141.73 is: 18,123.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,638.22 : 29,840.04 = 13,141.73 : x
  2. Step 2: Convert to fraction form
    21,638.22/29,840.04 = 13,141.73/x
  3. Step 3: Cross multiply
    21,638.22x = 29,840.04 × 13,141.73
  4. Step 4: Simplify right side
    21,638.22x = 392,149,599.67
  5. Step 5: Solve for x
    x = 392,149,599.67/21,638.22
  6. Step 6: Final answer
    x = 18,123.01

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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.