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Finding the Fourth Proportional to 15,042.72, 20,764.41 and 8,755.10

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Solution

The fourth proportional to 15,042.72, 20,764.41 and 8,755.10 is: 12,085.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,042.72 : 20,764.41 = 8,755.10 : x
  2. Step 2: Convert to fraction form
    15,042.72/20,764.41 = 8,755.10/x
  3. Step 3: Cross multiply
    15,042.72x = 20,764.41 × 8,755.10
  4. Step 4: Simplify right side
    15,042.72x = 181,794,349.34
  5. Step 5: Solve for x
    x = 181,794,349.34/15,042.72
  6. Step 6: Final answer
    x = 12,085.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.