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Finding the Fourth Proportional to 9,385.37, 12,924.24 and 8,390.28

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Solution

The fourth proportional to 9,385.37, 12,924.24 and 8,390.28 is: 11,553.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,385.37 : 12,924.24 = 8,390.28 : x
  2. Step 2: Convert to fraction form
    9,385.37/12,924.24 = 8,390.28/x
  3. Step 3: Cross multiply
    9,385.37x = 12,924.24 × 8,390.28
  4. Step 4: Simplify right side
    9,385.37x = 108,437,992.39
  5. Step 5: Solve for x
    x = 108,437,992.39/9,385.37
  6. Step 6: Final answer
    x = 11,553.95

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Half scale
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Double scale
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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.