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Finding the Fourth Proportional to 8,792.85, 12,139.79 and 7,847.02

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Solution

The fourth proportional to 8,792.85, 12,139.79 and 7,847.02 is: 10,833.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,792.85 : 12,139.79 = 7,847.02 : x
  2. Step 2: Convert to fraction form
    8,792.85/12,139.79 = 7,847.02/x
  3. Step 3: Cross multiply
    8,792.85x = 12,139.79 × 7,847.02
  4. Step 4: Simplify right side
    8,792.85x = 95,261,164.19
  5. Step 5: Solve for x
    x = 95,261,164.19/8,792.85
  6. Step 6: Final answer
    x = 10,833.93

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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.