Home / 20,817.30-28,737.26-13,273.76

Finding the Fourth Proportional to 20,817.30, 28,737.26 and 13,273.76

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Solution

The fourth proportional to 20,817.30, 28,737.26 and 13,273.76 is: 18,323.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,817.30 : 28,737.26 = 13,273.76 : x
  2. Step 2: Convert to fraction form
    20,817.30/28,737.26 = 13,273.76/x
  3. Step 3: Cross multiply
    20,817.30x = 28,737.26 × 13,273.76
  4. Step 4: Simplify right side
    20,817.30x = 381,451,492.30
  5. Step 5: Solve for x
    x = 381,451,492.30/20,817.30
  6. Step 6: Final answer
    x = 18,323.77

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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.