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Finding the Fourth Proportional to 20,617.76, 30,927.21 and 7,288.87

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Solution

The fourth proportional to 20,617.76, 30,927.21 and 7,288.87 is: 10,933.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,617.76 : 30,927.21 = 7,288.87 : x
  2. Step 2: Convert to fraction form
    20,617.76/30,927.21 = 7,288.87/x
  3. Step 3: Cross multiply
    20,617.76x = 30,927.21 × 7,288.87
  4. Step 4: Simplify right side
    20,617.76x = 225,424,240.29
  5. Step 5: Solve for x
    x = 225,424,240.29/20,617.76
  6. Step 6: Final answer
    x = 10,933.50

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1.5x scale

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.