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Finding the Fourth Proportional to 18,757.51, 28,128.05 and 8,899.60

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Solution

The fourth proportional to 18,757.51, 28,128.05 and 8,899.60 is: 13,345.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,757.51 : 28,128.05 = 8,899.60 : x
  2. Step 2: Convert to fraction form
    18,757.51/28,128.05 = 8,899.60/x
  3. Step 3: Cross multiply
    18,757.51x = 28,128.05 × 8,899.60
  4. Step 4: Simplify right side
    18,757.51x = 250,328,253.14
  5. Step 5: Solve for x
    x = 250,328,253.14/18,757.51
  6. Step 6: Final answer
    x = 13,345.50

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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.