Home / 13,028.88-17,980.20-7,439.76

Finding the Fourth Proportional to 13,028.88, 17,980.20 and 7,439.76

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Solution

The fourth proportional to 13,028.88, 17,980.20 and 7,439.76 is: 10,267.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,028.88 : 17,980.20 = 7,439.76 : x
  2. Step 2: Convert to fraction form
    13,028.88/17,980.20 = 7,439.76/x
  3. Step 3: Cross multiply
    13,028.88x = 17,980.20 × 7,439.76
  4. Step 4: Simplify right side
    13,028.88x = 133,768,372.75
  5. Step 5: Solve for x
    x = 133,768,372.75/13,028.88
  6. Step 6: Final answer
    x = 10,267.07

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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.