Home / 2,987.69-4,123.19-1,808.87

Finding the Fourth Proportional to 2,987.69, 4,123.19 and 1,808.87

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Solution

The fourth proportional to 2,987.69, 4,123.19 and 1,808.87 is: 2,496.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.69 : 4,123.19 = 1,808.87 : x
  2. Step 2: Convert to fraction form
    2,987.69/4,123.19 = 1,808.87/x
  3. Step 3: Cross multiply
    2,987.69x = 4,123.19 × 1,808.87
  4. Step 4: Simplify right side
    2,987.69x = 7,458,305.65
  5. Step 5: Solve for x
    x = 7,458,305.65/2,987.69
  6. Step 6: Final answer
    x = 2,496.35

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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.