Home / 20,139.92-27,800.85-13,423.10

Finding the Fourth Proportional to 20,139.92, 27,800.85 and 13,423.10

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Solution

The fourth proportional to 20,139.92, 27,800.85 and 13,423.10 is: 18,529.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.92 : 27,800.85 = 13,423.10 : x
  2. Step 2: Convert to fraction form
    20,139.92/27,800.85 = 13,423.10/x
  3. Step 3: Cross multiply
    20,139.92x = 27,800.85 × 13,423.10
  4. Step 4: Simplify right side
    20,139.92x = 373,173,659.14
  5. Step 5: Solve for x
    x = 373,173,659.14/20,139.92
  6. Step 6: Final answer
    x = 18,529.05

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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.