Home / 13,890.35-20,811.23-11,565.30

Finding the Fourth Proportional to 13,890.35, 20,811.23 and 11,565.30

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Solution

The fourth proportional to 13,890.35, 20,811.23 and 11,565.30 is: 17,327.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,890.35 : 20,811.23 = 11,565.30 : x
  2. Step 2: Convert to fraction form
    13,890.35/20,811.23 = 11,565.30/x
  3. Step 3: Cross multiply
    13,890.35x = 20,811.23 × 11,565.30
  4. Step 4: Simplify right side
    13,890.35x = 240,688,060.49
  5. Step 5: Solve for x
    x = 240,688,060.49/13,890.35
  6. Step 6: Final answer
    x = 17,327.72

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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.