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Finding the Fourth Proportional to 19,220.90, 28,834.32 and 8,127.64

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Solution

The fourth proportional to 19,220.90, 28,834.32 and 8,127.64 is: 12,192.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,220.90 : 28,834.32 = 8,127.64 : x
  2. Step 2: Convert to fraction form
    19,220.90/28,834.32 = 8,127.64/x
  3. Step 3: Cross multiply
    19,220.90x = 28,834.32 × 8,127.64
  4. Step 4: Simplify right side
    19,220.90x = 234,354,972.60
  5. Step 5: Solve for x
    x = 234,354,972.60/19,220.90
  6. Step 6: Final answer
    x = 12,192.72

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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.