Home / 8,918.88-12,310.58-5,382.32

Finding the Fourth Proportional to 8,918.88, 12,310.58 and 5,382.32

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Solution

The fourth proportional to 8,918.88, 12,310.58 and 5,382.32 is: 7,429.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.88 : 12,310.58 = 5,382.32 : x
  2. Step 2: Convert to fraction form
    8,918.88/12,310.58 = 5,382.32/x
  3. Step 3: Cross multiply
    8,918.88x = 12,310.58 × 5,382.32
  4. Step 4: Simplify right side
    8,918.88x = 66,259,432.85
  5. Step 5: Solve for x
    x = 66,259,432.85/8,918.88
  6. Step 6: Final answer
    x = 7,429.12

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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.