Home / 20,492.29-30,738.30-11,720.98

Finding the Fourth Proportional to 20,492.29, 30,738.30 and 11,720.98

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Solution

The fourth proportional to 20,492.29, 30,738.30 and 11,720.98 is: 17,581.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,492.29 : 30,738.30 = 11,720.98 : x
  2. Step 2: Convert to fraction form
    20,492.29/30,738.30 = 11,720.98/x
  3. Step 3: Cross multiply
    20,492.29x = 30,738.30 × 11,720.98
  4. Step 4: Simplify right side
    20,492.29x = 360,282,999.53
  5. Step 5: Solve for x
    x = 360,282,999.53/20,492.29
  6. Step 6: Final answer
    x = 17,581.39

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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.