Home / 5,490.70-7,575.86-3,131.58

Finding the Fourth Proportional to 5,490.70, 7,575.86 and 3,131.58

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Solution

The fourth proportional to 5,490.70, 7,575.86 and 3,131.58 is: 4,320.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,490.70 : 7,575.86 = 3,131.58 : x
  2. Step 2: Convert to fraction form
    5,490.70/7,575.86 = 3,131.58/x
  3. Step 3: Cross multiply
    5,490.70x = 7,575.86 × 3,131.58
  4. Step 4: Simplify right side
    5,490.70x = 23,724,411.66
  5. Step 5: Solve for x
    x = 23,724,411.66/5,490.70
  6. Step 6: Final answer
    x = 4,320.84

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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.