Home / 20,902.09-31,354.18-6,856.43

Finding the Fourth Proportional to 20,902.09, 31,354.18 and 6,856.43

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Solution

The fourth proportional to 20,902.09, 31,354.18 and 6,856.43 is: 10,284.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,902.09 : 31,354.18 = 6,856.43 : x
  2. Step 2: Convert to fraction form
    20,902.09/31,354.18 = 6,856.43/x
  3. Step 3: Cross multiply
    20,902.09x = 31,354.18 × 6,856.43
  4. Step 4: Simplify right side
    20,902.09x = 214,977,706.10
  5. Step 5: Solve for x
    x = 214,977,706.10/20,902.09
  6. Step 6: Final answer
    x = 10,284.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.