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Finding the Fourth Proportional to 28,913.19, 43,369.80 and 8,136.69

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Solution

The fourth proportional to 28,913.19, 43,369.80 and 8,136.69 is: 12,205.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,913.19 : 43,369.80 = 8,136.69 : x
  2. Step 2: Convert to fraction form
    28,913.19/43,369.80 = 8,136.69/x
  3. Step 3: Cross multiply
    28,913.19x = 43,369.80 × 8,136.69
  4. Step 4: Simplify right side
    28,913.19x = 352,886,577.28
  5. Step 5: Solve for x
    x = 352,886,577.28/28,913.19
  6. Step 6: Final answer
    x = 12,205.04

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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.