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Finding the Fourth Proportional to 18,814.50, 28,223.64 and 4,963.50

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Solution

The fourth proportional to 18,814.50, 28,223.64 and 4,963.50 is: 7,445.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,814.50 : 28,223.64 = 4,963.50 : x
  2. Step 2: Convert to fraction form
    18,814.50/28,223.64 = 4,963.50/x
  3. Step 3: Cross multiply
    18,814.50x = 28,223.64 × 4,963.50
  4. Step 4: Simplify right side
    18,814.50x = 140,088,037.14
  5. Step 5: Solve for x
    x = 140,088,037.14/18,814.50
  6. Step 6: Final answer
    x = 7,445.75

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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.