Home / 13,729.75-18,895.98-11,320.45

Finding the Fourth Proportional to 13,729.75, 18,895.98 and 11,320.45

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Solution

The fourth proportional to 13,729.75, 18,895.98 and 11,320.45 is: 15,580.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,729.75 : 18,895.98 = 11,320.45 : x
  2. Step 2: Convert to fraction form
    13,729.75/18,895.98 = 11,320.45/x
  3. Step 3: Cross multiply
    13,729.75x = 18,895.98 × 11,320.45
  4. Step 4: Simplify right side
    13,729.75x = 213,910,996.79
  5. Step 5: Solve for x
    x = 213,910,996.79/13,729.75
  6. Step 6: Final answer
    x = 15,580.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.