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Finding the Fourth Proportional to 10,910.16, 15,072.48 and 8,810.64

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Solution

The fourth proportional to 10,910.16, 15,072.48 and 8,810.64 is: 12,171.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,910.16 : 15,072.48 = 8,810.64 : x
  2. Step 2: Convert to fraction form
    10,910.16/15,072.48 = 8,810.64/x
  3. Step 3: Cross multiply
    10,910.16x = 15,072.48 × 8,810.64
  4. Step 4: Simplify right side
    10,910.16x = 132,798,195.19
  5. Step 5: Solve for x
    x = 132,798,195.19/10,910.16
  6. Step 6: Final answer
    x = 12,171.98

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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.