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Finding the Fourth Proportional to 8,680.13, 13,015.18 and 7,642.22

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Solution

The fourth proportional to 8,680.13, 13,015.18 and 7,642.22 is: 11,458.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,680.13 : 13,015.18 = 7,642.22 : x
  2. Step 2: Convert to fraction form
    8,680.13/13,015.18 = 7,642.22/x
  3. Step 3: Cross multiply
    8,680.13x = 13,015.18 × 7,642.22
  4. Step 4: Simplify right side
    8,680.13x = 99,464,813.38
  5. Step 5: Solve for x
    x = 99,464,813.38/8,680.13
  6. Step 6: Final answer
    x = 11,458.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.