Home / 8,921.23-12,311.45-5,383.69

Finding the Fourth Proportional to 8,921.23, 12,311.45 and 5,383.69

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Solution

The fourth proportional to 8,921.23, 12,311.45 and 5,383.69 is: 7,429.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.23 : 12,311.45 = 5,383.69 : x
  2. Step 2: Convert to fraction form
    8,921.23/12,311.45 = 5,383.69/x
  3. Step 3: Cross multiply
    8,921.23x = 12,311.45 × 5,383.69
  4. Step 4: Simplify right side
    8,921.23x = 66,281,030.25
  5. Step 5: Solve for x
    x = 66,281,030.25/8,921.23
  6. Step 6: Final answer
    x = 7,429.58

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Half scale
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Double scale
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Similar ratio
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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.