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Finding the Fourth Proportional to 19,310.40, 28,922.40 and 14,913.60

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Solution

The fourth proportional to 19,310.40, 28,922.40 and 14,913.60 is: 22,337.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,310.40 : 28,922.40 = 14,913.60 : x
  2. Step 2: Convert to fraction form
    19,310.40/28,922.40 = 14,913.60/x
  3. Step 3: Cross multiply
    19,310.40x = 28,922.40 × 14,913.60
  4. Step 4: Simplify right side
    19,310.40x = 431,337,104.64
  5. Step 5: Solve for x
    x = 431,337,104.64/19,310.40
  6. Step 6: Final answer
    x = 22,337.04

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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.