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Finding the Fourth Proportional to 18,732.70, 28,111.20 and 10,835.20

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Solution

The fourth proportional to 18,732.70, 28,111.20 and 10,835.20 is: 16,259.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,732.70 : 28,111.20 = 10,835.20 : x
  2. Step 2: Convert to fraction form
    18,732.70/28,111.20 = 10,835.20/x
  3. Step 3: Cross multiply
    18,732.70x = 28,111.20 × 10,835.20
  4. Step 4: Simplify right side
    18,732.70x = 304,590,474.24
  5. Step 5: Solve for x
    x = 304,590,474.24/18,732.70
  6. Step 6: Final answer
    x = 16,259.83

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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.