Home / 21,261.43-31,871.49-11,905.93

Finding the Fourth Proportional to 21,261.43, 31,871.49 and 11,905.93

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Solution

The fourth proportional to 21,261.43, 31,871.49 and 11,905.93 is: 17,847.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,261.43 : 31,871.49 = 11,905.93 : x
  2. Step 2: Convert to fraction form
    21,261.43/31,871.49 = 11,905.93/x
  3. Step 3: Cross multiply
    21,261.43x = 31,871.49 × 11,905.93
  4. Step 4: Simplify right side
    21,261.43x = 379,459,728.94
  5. Step 5: Solve for x
    x = 379,459,728.94/21,261.43
  6. Step 6: Final answer
    x = 17,847.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.