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Finding the Fourth Proportional to 18,801.60, 28,205.10 and 9,441.78

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Solution

The fourth proportional to 18,801.60, 28,205.10 and 9,441.78 is: 14,164.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,801.60 : 28,205.10 = 9,441.78 : x
  2. Step 2: Convert to fraction form
    18,801.60/28,205.10 = 9,441.78/x
  3. Step 3: Cross multiply
    18,801.60x = 28,205.10 × 9,441.78
  4. Step 4: Simplify right side
    18,801.60x = 266,306,349.08
  5. Step 5: Solve for x
    x = 266,306,349.08/18,801.60
  6. Step 6: Final answer
    x = 14,164.03

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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.