Home / 2,130.90-2,939.96-1,246.38

Finding the Fourth Proportional to 2,130.90, 2,939.96 and 1,246.38

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Solution

The fourth proportional to 2,130.90, 2,939.96 and 1,246.38 is: 1,719.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.90 : 2,939.96 = 1,246.38 : x
  2. Step 2: Convert to fraction form
    2,130.90/2,939.96 = 1,246.38/x
  3. Step 3: Cross multiply
    2,130.90x = 2,939.96 × 1,246.38
  4. Step 4: Simplify right side
    2,130.90x = 3,664,299.44
  5. Step 5: Solve for x
    x = 3,664,299.44/2,130.90
  6. Step 6: Final answer
    x = 1,719.60

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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.