Home / 2,178.56-3,006.36-1,247.12

Finding the Fourth Proportional to 2,178.56, 3,006.36 and 1,247.12

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Solution

The fourth proportional to 2,178.56, 3,006.36 and 1,247.12 is: 1,721.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.56 : 3,006.36 = 1,247.12 : x
  2. Step 2: Convert to fraction form
    2,178.56/3,006.36 = 1,247.12/x
  3. Step 3: Cross multiply
    2,178.56x = 3,006.36 × 1,247.12
  4. Step 4: Simplify right side
    2,178.56x = 3,749,291.68
  5. Step 5: Solve for x
    x = 3,749,291.68/2,178.56
  6. Step 6: Final answer
    x = 1,721.00

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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.