Home / 8,431.57-11,636.55-7,012.75

Finding the Fourth Proportional to 8,431.57, 11,636.55 and 7,012.75

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Solution

The fourth proportional to 8,431.57, 11,636.55 and 7,012.75 is: 9,678.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,431.57 : 11,636.55 = 7,012.75 : x
  2. Step 2: Convert to fraction form
    8,431.57/11,636.55 = 7,012.75/x
  3. Step 3: Cross multiply
    8,431.57x = 11,636.55 × 7,012.75
  4. Step 4: Simplify right side
    8,431.57x = 81,604,231.61
  5. Step 5: Solve for x
    x = 81,604,231.61/8,431.57
  6. Step 6: Final answer
    x = 9,678.42

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Half scale
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Double scale
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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.