Home / 2,130.10-2,939.09-1,245.72

Finding the Fourth Proportional to 2,130.10, 2,939.09 and 1,245.72

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Solution

The fourth proportional to 2,130.10, 2,939.09 and 1,245.72 is: 1,718.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.10 : 2,939.09 = 1,245.72 : x
  2. Step 2: Convert to fraction form
    2,130.10/2,939.09 = 1,245.72/x
  3. Step 3: Cross multiply
    2,130.10x = 2,939.09 × 1,245.72
  4. Step 4: Simplify right side
    2,130.10x = 3,661,287.99
  5. Step 5: Solve for x
    x = 3,661,287.99/2,130.10
  6. Step 6: Final answer
    x = 1,718.84

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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.