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Finding the Fourth Proportional to 11,010, 16,515 and 3,218.88

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Solution

The fourth proportional to 11,010, 16,515 and 3,218.88 is: 4,828.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,010 : 16,515 = 3,218.88 : x
  2. Step 2: Convert to fraction form
    11,010/16,515 = 3,218.88/x
  3. Step 3: Cross multiply
    11,010x = 16,515 × 3,218.88
  4. Step 4: Simplify right side
    11,010x = 53,159,803.20
  5. Step 5: Solve for x
    x = 53,159,803.20/11,010
  6. Step 6: Final answer
    x = 4,828.32

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.