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Finding the Fourth Proportional to 9,728.31, 13,479.28 and 9,518.11

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Solution

The fourth proportional to 9,728.31, 13,479.28 and 9,518.11 is: 13,188.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,728.31 : 13,479.28 = 9,518.11 : x
  2. Step 2: Convert to fraction form
    9,728.31/13,479.28 = 9,518.11/x
  3. Step 3: Cross multiply
    9,728.31x = 13,479.28 × 9,518.11
  4. Step 4: Simplify right side
    9,728.31x = 128,297,269.76
  5. Step 5: Solve for x
    x = 128,297,269.76/9,728.31
  6. Step 6: Final answer
    x = 13,188.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.