Home / 2,130.63-2,940.26-1,247.19

Finding the Fourth Proportional to 2,130.63, 2,940.26 and 1,247.19

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Solution

The fourth proportional to 2,130.63, 2,940.26 and 1,247.19 is: 1,721.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.63 : 2,940.26 = 1,247.19 : x
  2. Step 2: Convert to fraction form
    2,130.63/2,940.26 = 1,247.19/x
  3. Step 3: Cross multiply
    2,130.63x = 2,940.26 × 1,247.19
  4. Step 4: Simplify right side
    2,130.63x = 3,667,062.87
  5. Step 5: Solve for x
    x = 3,667,062.87/2,130.63
  6. Step 6: Final answer
    x = 1,721.12

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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.