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Finding the Fourth Proportional to 18,957.53, 28,416.29 and 7,103.57

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Solution

The fourth proportional to 18,957.53, 28,416.29 and 7,103.57 is: 10,647.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,957.53 : 28,416.29 = 7,103.57 : x
  2. Step 2: Convert to fraction form
    18,957.53/28,416.29 = 7,103.57/x
  3. Step 3: Cross multiply
    18,957.53x = 28,416.29 × 7,103.57
  4. Step 4: Simplify right side
    18,957.53x = 201,856,927.56
  5. Step 5: Solve for x
    x = 201,856,927.56/18,957.53
  6. Step 6: Final answer
    x = 10,647.85

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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.