Home / 20,711.99-28,586.25-12,213.60

Finding the Fourth Proportional to 20,711.99, 28,586.25 and 12,213.60

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Solution

The fourth proportional to 20,711.99, 28,586.25 and 12,213.60 is: 16,856.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.99 : 28,586.25 = 12,213.60 : x
  2. Step 2: Convert to fraction form
    20,711.99/28,586.25 = 12,213.60/x
  3. Step 3: Cross multiply
    20,711.99x = 28,586.25 × 12,213.60
  4. Step 4: Simplify right side
    20,711.99x = 349,141,007.53
  5. Step 5: Solve for x
    x = 349,141,007.53/20,711.99
  6. Step 6: Final answer
    x = 16,856.95

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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.