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Finding the Fourth Proportional to 18,801.76, 28,212.72 and 14,427.04

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Solution

The fourth proportional to 18,801.76, 28,212.72 and 14,427.04 is: 21,648.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,801.76 : 28,212.72 = 14,427.04 : x
  2. Step 2: Convert to fraction form
    18,801.76/28,212.72 = 14,427.04/x
  3. Step 3: Cross multiply
    18,801.76x = 28,212.72 × 14,427.04
  4. Step 4: Simplify right side
    18,801.76x = 407,026,039.95
  5. Step 5: Solve for x
    x = 407,026,039.95/18,801.76
  6. Step 6: Final answer
    x = 21,648.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.