Home / 20,610.12-28,439.38-12,225

Finding the Fourth Proportional to 20,610.12, 28,439.38 and 12,225

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Solution

The fourth proportional to 20,610.12, 28,439.38 and 12,225 is: 16,868.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,610.12 : 28,439.38 = 12,225 : x
  2. Step 2: Convert to fraction form
    20,610.12/28,439.38 = 12,225/x
  3. Step 3: Cross multiply
    20,610.12x = 28,439.38 × 12,225
  4. Step 4: Simplify right side
    20,610.12x = 347,671,420.50
  5. Step 5: Solve for x
    x = 347,671,420.50/20,610.12
  6. Step 6: Final answer
    x = 16,868.97

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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.