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Finding the Fourth Proportional to 20,635.44, 28,476.72 and 11,203.44

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Solution

The fourth proportional to 20,635.44, 28,476.72 and 11,203.44 is: 15,460.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,635.44 : 28,476.72 = 11,203.44 : x
  2. Step 2: Convert to fraction form
    20,635.44/28,476.72 = 11,203.44/x
  3. Step 3: Cross multiply
    20,635.44x = 28,476.72 × 11,203.44
  4. Step 4: Simplify right side
    20,635.44x = 319,037,223.92
  5. Step 5: Solve for x
    x = 319,037,223.92/20,635.44
  6. Step 6: Final answer
    x = 15,460.65

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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.