Home / 20,868.03-31,302-13,861.71

Finding the Fourth Proportional to 20,868.03, 31,302 and 13,861.71

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Solution

The fourth proportional to 20,868.03, 31,302 and 13,861.71 is: 20,792.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.03 : 31,302 = 13,861.71 : x
  2. Step 2: Convert to fraction form
    20,868.03/31,302 = 13,861.71/x
  3. Step 3: Cross multiply
    20,868.03x = 31,302 × 13,861.71
  4. Step 4: Simplify right side
    20,868.03x = 433,899,246.42
  5. Step 5: Solve for x
    x = 433,899,246.42/20,868.03
  6. Step 6: Final answer
    x = 20,792.54

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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.