Home / 8,634.90-11,918.16-5,490.48

Finding the Fourth Proportional to 8,634.90, 11,918.16 and 5,490.48

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Solution

The fourth proportional to 8,634.90, 11,918.16 and 5,490.48 is: 7,578.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,634.90 : 11,918.16 = 5,490.48 : x
  2. Step 2: Convert to fraction form
    8,634.90/11,918.16 = 5,490.48/x
  3. Step 3: Cross multiply
    8,634.90x = 11,918.16 × 5,490.48
  4. Step 4: Simplify right side
    8,634.90x = 65,436,419.12
  5. Step 5: Solve for x
    x = 65,436,419.12/8,634.90
  6. Step 6: Final answer
    x = 7,578.13

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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.