Home / 3,415.80-5,123.70-2,551.80

Finding the Fourth Proportional to 3,415.80, 5,123.70 and 2,551.80

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Solution

The fourth proportional to 3,415.80, 5,123.70 and 2,551.80 is: 3,827.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,415.80 : 5,123.70 = 2,551.80 : x
  2. Step 2: Convert to fraction form
    3,415.80/5,123.70 = 2,551.80/x
  3. Step 3: Cross multiply
    3,415.80x = 5,123.70 × 2,551.80
  4. Step 4: Simplify right side
    3,415.80x = 13,074,657.66
  5. Step 5: Solve for x
    x = 13,074,657.66/3,415.80
  6. Step 6: Final answer
    x = 3,827.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.