Home / 3,720.72-5,129.46-3,605.70

Finding the Fourth Proportional to 3,720.72, 5,129.46 and 3,605.70

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Solution

The fourth proportional to 3,720.72, 5,129.46 and 3,605.70 is: 4,970.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.72 : 5,129.46 = 3,605.70 : x
  2. Step 2: Convert to fraction form
    3,720.72/5,129.46 = 3,605.70/x
  3. Step 3: Cross multiply
    3,720.72x = 5,129.46 × 3,605.70
  4. Step 4: Simplify right side
    3,720.72x = 18,495,293.92
  5. Step 5: Solve for x
    x = 18,495,293.92/3,720.72
  6. Step 6: Final answer
    x = 4,970.89

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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.