Home / 18,287.30-25,240.74-12,983.78

Finding the Fourth Proportional to 18,287.30, 25,240.74 and 12,983.78

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Solution

The fourth proportional to 18,287.30, 25,240.74 and 12,983.78 is: 17,920.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,287.30 : 25,240.74 = 12,983.78 : x
  2. Step 2: Convert to fraction form
    18,287.30/25,240.74 = 12,983.78/x
  3. Step 3: Cross multiply
    18,287.30x = 25,240.74 × 12,983.78
  4. Step 4: Simplify right side
    18,287.30x = 327,720,215.20
  5. Step 5: Solve for x
    x = 327,720,215.20/18,287.30
  6. Step 6: Final answer
    x = 17,920.65

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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.