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Finding the Fourth Proportional to 10,990.64, 15,169.48 and 7,010.88

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Solution

The fourth proportional to 10,990.64, 15,169.48 and 7,010.88 is: 9,676.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,990.64 : 15,169.48 = 7,010.88 : x
  2. Step 2: Convert to fraction form
    10,990.64/15,169.48 = 7,010.88/x
  3. Step 3: Cross multiply
    10,990.64x = 15,169.48 × 7,010.88
  4. Step 4: Simplify right side
    10,990.64x = 106,351,403.94
  5. Step 5: Solve for x
    x = 106,351,403.94/10,990.64
  6. Step 6: Final answer
    x = 9,676.54

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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.