Home / 3,139.67-4,332.80-1,813.49

Finding the Fourth Proportional to 3,139.67, 4,332.80 and 1,813.49

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Solution

The fourth proportional to 3,139.67, 4,332.80 and 1,813.49 is: 2,502.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.67 : 4,332.80 = 1,813.49 : x
  2. Step 2: Convert to fraction form
    3,139.67/4,332.80 = 1,813.49/x
  3. Step 3: Cross multiply
    3,139.67x = 4,332.80 × 1,813.49
  4. Step 4: Simplify right side
    3,139.67x = 7,857,489.47
  5. Step 5: Solve for x
    x = 7,857,489.47/3,139.67
  6. Step 6: Final answer
    x = 2,502.65

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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.