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Finding the Fourth Proportional to 8,351, 11,521.20 and 5,519.72

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Solution

The fourth proportional to 8,351, 11,521.20 and 5,519.72 is: 7,615.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,351 : 11,521.20 = 5,519.72 : x
  2. Step 2: Convert to fraction form
    8,351/11,521.20 = 5,519.72/x
  3. Step 3: Cross multiply
    8,351x = 11,521.20 × 5,519.72
  4. Step 4: Simplify right side
    8,351x = 63,593,798.06
  5. Step 5: Solve for x
    x = 63,593,798.06/8,351
  6. Step 6: Final answer
    x = 7,615.11

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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.