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Finding the Fourth Proportional to 7,842.38, 10,822.10 and 4,305.54

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Solution

The fourth proportional to 7,842.38, 10,822.10 and 4,305.54 is: 5,941.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,842.38 : 10,822.10 = 4,305.54 : x
  2. Step 2: Convert to fraction form
    7,842.38/10,822.10 = 4,305.54/x
  3. Step 3: Cross multiply
    7,842.38x = 10,822.10 × 4,305.54
  4. Step 4: Simplify right side
    7,842.38x = 46,594,984.43
  5. Step 5: Solve for x
    x = 46,594,984.43/7,842.38
  6. Step 6: Final answer
    x = 5,941.43

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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.