Home / 13,565.85-20,315.97-11,728.77

Finding the Fourth Proportional to 13,565.85, 20,315.97 and 11,728.77

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Solution

The fourth proportional to 13,565.85, 20,315.97 and 11,728.77 is: 17,564.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,565.85 : 20,315.97 = 11,728.77 : x
  2. Step 2: Convert to fraction form
    13,565.85/20,315.97 = 11,728.77/x
  3. Step 3: Cross multiply
    13,565.85x = 20,315.97 × 11,728.77
  4. Step 4: Simplify right side
    13,565.85x = 238,281,377.55
  5. Step 5: Solve for x
    x = 238,281,377.55/13,565.85
  6. Step 6: Final answer
    x = 17,564.79

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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.