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Finding the Fourth Proportional to 18,830.40, 28,245.60 and 9,499.20

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Solution

The fourth proportional to 18,830.40, 28,245.60 and 9,499.20 is: 14,248.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,830.40 : 28,245.60 = 9,499.20 : x
  2. Step 2: Convert to fraction form
    18,830.40/28,245.60 = 9,499.20/x
  3. Step 3: Cross multiply
    18,830.40x = 28,245.60 × 9,499.20
  4. Step 4: Simplify right side
    18,830.40x = 268,310,603.52
  5. Step 5: Solve for x
    x = 268,310,603.52/18,830.40
  6. Step 6: Final answer
    x = 14,248.80

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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.