Home / 21,558.84-29,749.92-12,126.78

Finding the Fourth Proportional to 21,558.84, 29,749.92 and 12,126.78

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Solution

The fourth proportional to 21,558.84, 29,749.92 and 12,126.78 is: 16,734.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,558.84 : 29,749.92 = 12,126.78 : x
  2. Step 2: Convert to fraction form
    21,558.84/29,749.92 = 12,126.78/x
  3. Step 3: Cross multiply
    21,558.84x = 29,749.92 × 12,126.78
  4. Step 4: Simplify right side
    21,558.84x = 360,770,734.86
  5. Step 5: Solve for x
    x = 360,770,734.86/21,558.84
  6. Step 6: Final answer
    x = 16,734.24

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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.