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Finding the Fourth Proportional to 18,755.10, 28,132.69 and 7,661.80

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Solution

The fourth proportional to 18,755.10, 28,132.69 and 7,661.80 is: 11,492.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,755.10 : 28,132.69 = 7,661.80 : x
  2. Step 2: Convert to fraction form
    18,755.10/28,132.69 = 7,661.80/x
  3. Step 3: Cross multiply
    18,755.10x = 28,132.69 × 7,661.80
  4. Step 4: Simplify right side
    18,755.10x = 215,547,044.24
  5. Step 5: Solve for x
    x = 215,547,044.24/18,755.10
  6. Step 6: Final answer
    x = 11,492.72

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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.