Home / 13,485.91-18,619.20-8,707.99

Finding the Fourth Proportional to 13,485.91, 18,619.20 and 8,707.99

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Solution

The fourth proportional to 13,485.91, 18,619.20 and 8,707.99 is: 12,022.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,485.91 : 18,619.20 = 8,707.99 : x
  2. Step 2: Convert to fraction form
    13,485.91/18,619.20 = 8,707.99/x
  3. Step 3: Cross multiply
    13,485.91x = 18,619.20 × 8,707.99
  4. Step 4: Simplify right side
    13,485.91x = 162,135,807.41
  5. Step 5: Solve for x
    x = 162,135,807.41/13,485.91
  6. Step 6: Final answer
    x = 12,022.61

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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.