Home / 8,321.36-11,480.72-5,490.14

Finding the Fourth Proportional to 8,321.36, 11,480.72 and 5,490.14

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Solution

The fourth proportional to 8,321.36, 11,480.72 and 5,490.14 is: 7,574.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,321.36 : 11,480.72 = 5,490.14 : x
  2. Step 2: Convert to fraction form
    8,321.36/11,480.72 = 5,490.14/x
  3. Step 3: Cross multiply
    8,321.36x = 11,480.72 × 5,490.14
  4. Step 4: Simplify right side
    8,321.36x = 63,030,675.25
  5. Step 5: Solve for x
    x = 63,030,675.25/8,321.36
  6. Step 6: Final answer
    x = 7,574.57

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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.