Home / 8,380.72-11,562.09-5,398.28

Finding the Fourth Proportional to 8,380.72, 11,562.09 and 5,398.28

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Solution

The fourth proportional to 8,380.72, 11,562.09 and 5,398.28 is: 7,447.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,380.72 : 11,562.09 = 5,398.28 : x
  2. Step 2: Convert to fraction form
    8,380.72/11,562.09 = 5,398.28/x
  3. Step 3: Cross multiply
    8,380.72x = 11,562.09 × 5,398.28
  4. Step 4: Simplify right side
    8,380.72x = 62,415,414.61
  5. Step 5: Solve for x
    x = 62,415,414.61/8,380.72
  6. Step 6: Final answer
    x = 7,447.50

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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.