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Finding the Fourth Proportional to 19,143.95, 28,704.17 and 7,443.53

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Solution

The fourth proportional to 19,143.95, 28,704.17 and 7,443.53 is: 11,160.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,143.95 : 28,704.17 = 7,443.53 : x
  2. Step 2: Convert to fraction form
    19,143.95/28,704.17 = 7,443.53/x
  3. Step 3: Cross multiply
    19,143.95x = 28,704.17 × 7,443.53
  4. Step 4: Simplify right side
    19,143.95x = 213,660,313.30
  5. Step 5: Solve for x
    x = 213,660,313.30/19,143.95
  6. Step 6: Final answer
    x = 11,160.72

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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.