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Finding the Fourth Proportional to 18,899.93, 28,349.91 and 8,499.53

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Solution

The fourth proportional to 18,899.93, 28,349.91 and 8,499.53 is: 12,749.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,899.93 : 28,349.91 = 8,499.53 : x
  2. Step 2: Convert to fraction form
    18,899.93/28,349.91 = 8,499.53/x
  3. Step 3: Cross multiply
    18,899.93x = 28,349.91 × 8,499.53
  4. Step 4: Simplify right side
    18,899.93x = 240,960,910.54
  5. Step 5: Solve for x
    x = 240,960,910.54/18,899.93
  6. Step 6: Final answer
    x = 12,749.30

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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.