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Finding the Fourth Proportional to 8,728.65, 12,015.11 and 7,607.64

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Solution

The fourth proportional to 8,728.65, 12,015.11 and 7,607.64 is: 10,472.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,728.65 : 12,015.11 = 7,607.64 : x
  2. Step 2: Convert to fraction form
    8,728.65/12,015.11 = 7,607.64/x
  3. Step 3: Cross multiply
    8,728.65x = 12,015.11 × 7,607.64
  4. Step 4: Simplify right side
    8,728.65x = 91,406,640.33
  5. Step 5: Solve for x
    x = 91,406,640.33/8,728.65
  6. Step 6: Final answer
    x = 10,472.03

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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.