Home / 13,680.45-20,505.64-5,358.91

Finding the Fourth Proportional to 13,680.45, 20,505.64 and 5,358.91

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Solution

The fourth proportional to 13,680.45, 20,505.64 and 5,358.91 is: 8,032.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,680.45 : 20,505.64 = 5,358.91 : x
  2. Step 2: Convert to fraction form
    13,680.45/20,505.64 = 5,358.91/x
  3. Step 3: Cross multiply
    13,680.45x = 20,505.64 × 5,358.91
  4. Step 4: Simplify right side
    13,680.45x = 109,887,879.25
  5. Step 5: Solve for x
    x = 109,887,879.25/13,680.45
  6. Step 6: Final answer
    x = 8,032.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.