Home / 3,139.90-4,333.16-1,813.58

Finding the Fourth Proportional to 3,139.90, 4,333.16 and 1,813.58

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Solution

The fourth proportional to 3,139.90, 4,333.16 and 1,813.58 is: 2,502.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.90 : 4,333.16 = 1,813.58 : x
  2. Step 2: Convert to fraction form
    3,139.90/4,333.16 = 1,813.58/x
  3. Step 3: Cross multiply
    3,139.90x = 4,333.16 × 1,813.58
  4. Step 4: Simplify right side
    3,139.90x = 7,858,532.31
  5. Step 5: Solve for x
    x = 7,858,532.31/3,139.90
  6. Step 6: Final answer
    x = 2,502.80

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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.