Home / 3,720.12-5,131.08-3,159.71

Finding the Fourth Proportional to 3,720.12, 5,131.08 and 3,159.71

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Solution

The fourth proportional to 3,720.12, 5,131.08 and 3,159.71 is: 4,358.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.12 : 5,131.08 = 3,159.71 : x
  2. Step 2: Convert to fraction form
    3,720.12/5,131.08 = 3,159.71/x
  3. Step 3: Cross multiply
    3,720.12x = 5,131.08 × 3,159.71
  4. Step 4: Simplify right side
    3,720.12x = 16,212,699.13
  5. Step 5: Solve for x
    x = 16,212,699.13/3,720.12
  6. Step 6: Final answer
    x = 4,358.11

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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.