Home / 21,338.60-29,447.21-12,391.34

Finding the Fourth Proportional to 21,338.60, 29,447.21 and 12,391.34

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Solution

The fourth proportional to 21,338.60, 29,447.21 and 12,391.34 is: 17,100.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,338.60 : 29,447.21 = 12,391.34 : x
  2. Step 2: Convert to fraction form
    21,338.60/29,447.21 = 12,391.34/x
  3. Step 3: Cross multiply
    21,338.60x = 29,447.21 × 12,391.34
  4. Step 4: Simplify right side
    21,338.60x = 364,890,274.90
  5. Step 5: Solve for x
    x = 364,890,274.90/21,338.60
  6. Step 6: Final answer
    x = 17,100.01

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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.