Home / 11,016.72-15,188.40-7,989.12

Finding the Fourth Proportional to 11,016.72, 15,188.40 and 7,989.12

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Solution

The fourth proportional to 11,016.72, 15,188.40 and 7,989.12 is: 11,014.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,016.72 : 15,188.40 = 7,989.12 : x
  2. Step 2: Convert to fraction form
    11,016.72/15,188.40 = 7,989.12/x
  3. Step 3: Cross multiply
    11,016.72x = 15,188.40 × 7,989.12
  4. Step 4: Simplify right side
    11,016.72x = 121,341,950.21
  5. Step 5: Solve for x
    x = 121,341,950.21/11,016.72
  6. Step 6: Final answer
    x = 11,014.34

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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.