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Finding the Fourth Proportional to 20,592.32, 28,416 and 11,640.16

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Solution

The fourth proportional to 20,592.32, 28,416 and 11,640.16 is: 16,062.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,592.32 : 28,416 = 11,640.16 : x
  2. Step 2: Convert to fraction form
    20,592.32/28,416 = 11,640.16/x
  3. Step 3: Cross multiply
    20,592.32x = 28,416 × 11,640.16
  4. Step 4: Simplify right side
    20,592.32x = 330,766,786.56
  5. Step 5: Solve for x
    x = 330,766,786.56/20,592.32
  6. Step 6: Final answer
    x = 16,062.63

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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.