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Finding the Fourth Proportional to 28,913.40, 43,370.10 and 8,136.90

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Solution

The fourth proportional to 28,913.40, 43,370.10 and 8,136.90 is: 12,205.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,913.40 : 43,370.10 = 8,136.90 : x
  2. Step 2: Convert to fraction form
    28,913.40/43,370.10 = 8,136.90/x
  3. Step 3: Cross multiply
    28,913.40x = 43,370.10 × 8,136.90
  4. Step 4: Simplify right side
    28,913.40x = 352,898,166.69
  5. Step 5: Solve for x
    x = 352,898,166.69/28,913.40
  6. Step 6: Final answer
    x = 12,205.35

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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.