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Finding the Fourth Proportional to 8,698.72, 11,992.32 and 5,510.40

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Solution

The fourth proportional to 8,698.72, 11,992.32 and 5,510.40 is: 7,596.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,698.72 : 11,992.32 = 5,510.40 : x
  2. Step 2: Convert to fraction form
    8,698.72/11,992.32 = 5,510.40/x
  3. Step 3: Cross multiply
    8,698.72x = 11,992.32 × 5,510.40
  4. Step 4: Simplify right side
    8,698.72x = 66,082,480.13
  5. Step 5: Solve for x
    x = 66,082,480.13/8,698.72
  6. Step 6: Final answer
    x = 7,596.81

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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.