Home / 13,382.69-20,064.11-8,118.91

Finding the Fourth Proportional to 13,382.69, 20,064.11 and 8,118.91

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Solution

The fourth proportional to 13,382.69, 20,064.11 and 8,118.91 is: 12,172.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,382.69 : 20,064.11 = 8,118.91 : x
  2. Step 2: Convert to fraction form
    13,382.69/20,064.11 = 8,118.91/x
  3. Step 3: Cross multiply
    13,382.69x = 20,064.11 × 8,118.91
  4. Step 4: Simplify right side
    13,382.69x = 162,898,703.32
  5. Step 5: Solve for x
    x = 162,898,703.32/13,382.69
  6. Step 6: Final answer
    x = 12,172.34

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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.