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Finding the Fourth Proportional to 8,918.83, 12,294.87 and 6,790.65

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Solution

The fourth proportional to 8,918.83, 12,294.87 and 6,790.65 is: 9,361.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.83 : 12,294.87 = 6,790.65 : x
  2. Step 2: Convert to fraction form
    8,918.83/12,294.87 = 6,790.65/x
  3. Step 3: Cross multiply
    8,918.83x = 12,294.87 × 6,790.65
  4. Step 4: Simplify right side
    8,918.83x = 83,490,158.97
  5. Step 5: Solve for x
    x = 83,490,158.97/8,918.83
  6. Step 6: Final answer
    x = 9,361.11

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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.