Home / 20,633.24-28,475.28-11,680.72

Finding the Fourth Proportional to 20,633.24, 28,475.28 and 11,680.72

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Solution

The fourth proportional to 20,633.24, 28,475.28 and 11,680.72 is: 16,120.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,633.24 : 28,475.28 = 11,680.72 : x
  2. Step 2: Convert to fraction form
    20,633.24/28,475.28 = 11,680.72/x
  3. Step 3: Cross multiply
    20,633.24x = 28,475.28 × 11,680.72
  4. Step 4: Simplify right side
    20,633.24x = 332,611,772.60
  5. Step 5: Solve for x
    x = 332,611,772.60/20,633.24
  6. Step 6: Final answer
    x = 16,120.19

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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.