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Finding the Fourth Proportional to 18,734.40, 28,101.60 and 9,403.20

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Solution

The fourth proportional to 18,734.40, 28,101.60 and 9,403.20 is: 14,104.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,734.40 : 28,101.60 = 9,403.20 : x
  2. Step 2: Convert to fraction form
    18,734.40/28,101.60 = 9,403.20/x
  3. Step 3: Cross multiply
    18,734.40x = 28,101.60 × 9,403.20
  4. Step 4: Simplify right side
    18,734.40x = 264,244,965.12
  5. Step 5: Solve for x
    x = 264,244,965.12/18,734.40
  6. Step 6: Final answer
    x = 14,104.80

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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.