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Finding the Fourth Proportional to 20,315.88, 30,476.25 and 7,165.53

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Solution

The fourth proportional to 20,315.88, 30,476.25 and 7,165.53 is: 10,749.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.88 : 30,476.25 = 7,165.53 : x
  2. Step 2: Convert to fraction form
    20,315.88/30,476.25 = 7,165.53/x
  3. Step 3: Cross multiply
    20,315.88x = 30,476.25 × 7,165.53
  4. Step 4: Simplify right side
    20,315.88x = 218,378,483.66
  5. Step 5: Solve for x
    x = 218,378,483.66/20,315.88
  6. Step 6: Final answer
    x = 10,749.15

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.