Home / 13,423.77-18,521.81-8,118.48

Finding the Fourth Proportional to 13,423.77, 18,521.81 and 8,118.48

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Solution

The fourth proportional to 13,423.77, 18,521.81 and 8,118.48 is: 11,201.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,423.77 : 18,521.81 = 8,118.48 : x
  2. Step 2: Convert to fraction form
    13,423.77/18,521.81 = 8,118.48/x
  3. Step 3: Cross multiply
    13,423.77x = 18,521.81 × 8,118.48
  4. Step 4: Simplify right side
    13,423.77x = 150,368,944.05
  5. Step 5: Solve for x
    x = 150,368,944.05/13,423.77
  6. Step 6: Final answer
    x = 11,201.69

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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.