Home / 3,129.69-4,318.87-1,803.62

Finding the Fourth Proportional to 3,129.69, 4,318.87 and 1,803.62

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Solution

The fourth proportional to 3,129.69, 4,318.87 and 1,803.62 is: 2,488.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.69 : 4,318.87 = 1,803.62 : x
  2. Step 2: Convert to fraction form
    3,129.69/4,318.87 = 1,803.62/x
  3. Step 3: Cross multiply
    3,129.69x = 4,318.87 × 1,803.62
  4. Step 4: Simplify right side
    3,129.69x = 7,789,585.69
  5. Step 5: Solve for x
    x = 7,789,585.69/3,129.69
  6. Step 6: Final answer
    x = 2,488.93

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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.