Home / 15,464.92-21,340.86-8,391.28

Finding the Fourth Proportional to 15,464.92, 21,340.86 and 8,391.28

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Solution

The fourth proportional to 15,464.92, 21,340.86 and 8,391.28 is: 11,579.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,464.92 : 21,340.86 = 8,391.28 : x
  2. Step 2: Convert to fraction form
    15,464.92/21,340.86 = 8,391.28/x
  3. Step 3: Cross multiply
    15,464.92x = 21,340.86 × 8,391.28
  4. Step 4: Simplify right side
    15,464.92x = 179,077,131.70
  5. Step 5: Solve for x
    x = 179,077,131.70/15,464.92
  6. Step 6: Final answer
    x = 11,579.57

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Double scale
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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.