Home / 3,139.60-4,322.78-2,666.50

Finding the Fourth Proportional to 3,139.60, 4,322.78 and 2,666.50

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Solution

The fourth proportional to 3,139.60, 4,322.78 and 2,666.50 is: 3,671.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.60 : 4,322.78 = 2,666.50 : x
  2. Step 2: Convert to fraction form
    3,139.60/4,322.78 = 2,666.50/x
  3. Step 3: Cross multiply
    3,139.60x = 4,322.78 × 2,666.50
  4. Step 4: Simplify right side
    3,139.60x = 11,526,692.87
  5. Step 5: Solve for x
    x = 11,526,692.87/3,139.60
  6. Step 6: Final answer
    x = 3,671.39

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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.