Home / 3,126.88-4,686.32-1,665.68

Finding the Fourth Proportional to 3,126.88, 4,686.32 and 1,665.68

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Solution

The fourth proportional to 3,126.88, 4,686.32 and 1,665.68 is: 2,496.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,126.88 : 4,686.32 = 1,665.68 : x
  2. Step 2: Convert to fraction form
    3,126.88/4,686.32 = 1,665.68/x
  3. Step 3: Cross multiply
    3,126.88x = 4,686.32 × 1,665.68
  4. Step 4: Simplify right side
    3,126.88x = 7,805,909.50
  5. Step 5: Solve for x
    x = 7,805,909.50/3,126.88
  6. Step 6: Final answer
    x = 2,496.39

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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.