Home / 8,130.87-11,207.61-6,636.21

Finding the Fourth Proportional to 8,130.87, 11,207.61 and 6,636.21

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Solution

The fourth proportional to 8,130.87, 11,207.61 and 6,636.21 is: 9,147.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,130.87 : 11,207.61 = 6,636.21 : x
  2. Step 2: Convert to fraction form
    8,130.87/11,207.61 = 6,636.21/x
  3. Step 3: Cross multiply
    8,130.87x = 11,207.61 × 6,636.21
  4. Step 4: Simplify right side
    8,130.87x = 74,376,053.56
  5. Step 5: Solve for x
    x = 74,376,053.56/8,130.87
  6. Step 6: Final answer
    x = 9,147.37

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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.