Home / 20,983.42-28,956.90-11,551.78

Finding the Fourth Proportional to 20,983.42, 28,956.90 and 11,551.78

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Solution

The fourth proportional to 20,983.42, 28,956.90 and 11,551.78 is: 15,941.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,983.42 : 28,956.90 = 11,551.78 : x
  2. Step 2: Convert to fraction form
    20,983.42/28,956.90 = 11,551.78/x
  3. Step 3: Cross multiply
    20,983.42x = 28,956.90 × 11,551.78
  4. Step 4: Simplify right side
    20,983.42x = 334,503,738.28
  5. Step 5: Solve for x
    x = 334,503,738.28/20,983.42
  6. Step 6: Final answer
    x = 15,941.34

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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.