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Finding the Fourth Proportional to 18,700.70, 28,029.72 and 11,683.94

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Solution

The fourth proportional to 18,700.70, 28,029.72 and 11,683.94 is: 17,512.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,700.70 : 28,029.72 = 11,683.94 : x
  2. Step 2: Convert to fraction form
    18,700.70/28,029.72 = 11,683.94/x
  3. Step 3: Cross multiply
    18,700.70x = 28,029.72 × 11,683.94
  4. Step 4: Simplify right side
    18,700.70x = 327,497,566.70
  5. Step 5: Solve for x
    x = 327,497,566.70/18,700.70
  6. Step 6: Final answer
    x = 17,512.58

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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.