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Finding the Fourth Proportional to 11,279.63, 15,550.98 and 9,255.63

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Solution

The fourth proportional to 11,279.63, 15,550.98 and 9,255.63 is: 12,760.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,279.63 : 15,550.98 = 9,255.63 : x
  2. Step 2: Convert to fraction form
    11,279.63/15,550.98 = 9,255.63/x
  3. Step 3: Cross multiply
    11,279.63x = 15,550.98 × 9,255.63
  4. Step 4: Simplify right side
    11,279.63x = 143,934,070.74
  5. Step 5: Solve for x
    x = 143,934,070.74/11,279.63
  6. Step 6: Final answer
    x = 12,760.53

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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.