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Finding the Fourth Proportional to 11,213.06, 15,471.88 and 7,018.88

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Solution

The fourth proportional to 11,213.06, 15,471.88 and 7,018.88 is: 9,684.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,213.06 : 15,471.88 = 7,018.88 : x
  2. Step 2: Convert to fraction form
    11,213.06/15,471.88 = 7,018.88/x
  3. Step 3: Cross multiply
    11,213.06x = 15,471.88 × 7,018.88
  4. Step 4: Simplify right side
    11,213.06x = 108,595,174.19
  5. Step 5: Solve for x
    x = 108,595,174.19/11,213.06
  6. Step 6: Final answer
    x = 9,684.71

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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.