Home / 20,299.68-28,018.24-13,213.76

Finding the Fourth Proportional to 20,299.68, 28,018.24 and 13,213.76

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Solution

The fourth proportional to 20,299.68, 28,018.24 and 13,213.76 is: 18,238.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,299.68 : 28,018.24 = 13,213.76 : x
  2. Step 2: Convert to fraction form
    20,299.68/28,018.24 = 13,213.76/x
  3. Step 3: Cross multiply
    20,299.68x = 28,018.24 × 13,213.76
  4. Step 4: Simplify right side
    20,299.68x = 370,226,298.98
  5. Step 5: Solve for x
    x = 370,226,298.98/20,299.68
  6. Step 6: Final answer
    x = 18,238.04

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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.