Home / 12,479.38-17,219.58-7,173.20

Finding the Fourth Proportional to 12,479.38, 17,219.58 and 7,173.20

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Solution

The fourth proportional to 12,479.38, 17,219.58 and 7,173.20 is: 9,897.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479.38 : 17,219.58 = 7,173.20 : x
  2. Step 2: Convert to fraction form
    12,479.38/17,219.58 = 7,173.20/x
  3. Step 3: Cross multiply
    12,479.38x = 17,219.58 × 7,173.20
  4. Step 4: Simplify right side
    12,479.38x = 123,519,491.26
  5. Step 5: Solve for x
    x = 123,519,491.26/12,479.38
  6. Step 6: Final answer
    x = 9,897.89

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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.