Home / 15,085.32-20,826.90-11,721.78

Finding the Fourth Proportional to 15,085.32, 20,826.90 and 11,721.78

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Solution

The fourth proportional to 15,085.32, 20,826.90 and 11,721.78 is: 16,183.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,085.32 : 20,826.90 = 11,721.78 : x
  2. Step 2: Convert to fraction form
    15,085.32/20,826.90 = 11,721.78/x
  3. Step 3: Cross multiply
    15,085.32x = 20,826.90 × 11,721.78
  4. Step 4: Simplify right side
    15,085.32x = 244,128,339.88
  5. Step 5: Solve for x
    x = 244,128,339.88/15,085.32
  6. Step 6: Final answer
    x = 16,183.17

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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.