Home / 19,720.56-29,581-6,211.76

Finding the Fourth Proportional to 19,720.56, 29,581 and 6,211.76

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Solution

The fourth proportional to 19,720.56, 29,581 and 6,211.76 is: 9,317.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,720.56 : 29,581 = 6,211.76 : x
  2. Step 2: Convert to fraction form
    19,720.56/29,581 = 6,211.76/x
  3. Step 3: Cross multiply
    19,720.56x = 29,581 × 6,211.76
  4. Step 4: Simplify right side
    19,720.56x = 183,750,072.56
  5. Step 5: Solve for x
    x = 183,750,072.56/19,720.56
  6. Step 6: Final answer
    x = 9,317.69

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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.