Home / 18,785.99-28,179.50-5,638.36

Finding the Fourth Proportional to 18,785.99, 28,179.50 and 5,638.36

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Solution

The fourth proportional to 18,785.99, 28,179.50 and 5,638.36 is: 8,457.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,785.99 : 28,179.50 = 5,638.36 : x
  2. Step 2: Convert to fraction form
    18,785.99/28,179.50 = 5,638.36/x
  3. Step 3: Cross multiply
    18,785.99x = 28,179.50 × 5,638.36
  4. Step 4: Simplify right side
    18,785.99x = 158,886,119.82
  5. Step 5: Solve for x
    x = 158,886,119.82/18,785.99
  6. Step 6: Final answer
    x = 8,457.69

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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.