Home / 13,922.57-20,887.70-6,428.42

Finding the Fourth Proportional to 13,922.57, 20,887.70 and 6,428.42

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Solution

The fourth proportional to 13,922.57, 20,887.70 and 6,428.42 is: 9,644.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,922.57 : 20,887.70 = 6,428.42 : x
  2. Step 2: Convert to fraction form
    13,922.57/20,887.70 = 6,428.42/x
  3. Step 3: Cross multiply
    13,922.57x = 20,887.70 × 6,428.42
  4. Step 4: Simplify right side
    13,922.57x = 134,274,847.18
  5. Step 5: Solve for x
    x = 134,274,847.18/13,922.57
  6. Step 6: Final answer
    x = 9,644.40

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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.