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Finding the Fourth Proportional to 19,329.60, 28,929.60 and 16,996.80

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Solution

The fourth proportional to 19,329.60, 28,929.60 and 16,996.80 is: 25,438.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,329.60 : 28,929.60 = 16,996.80 : x
  2. Step 2: Convert to fraction form
    19,329.60/28,929.60 = 16,996.80/x
  3. Step 3: Cross multiply
    19,329.60x = 28,929.60 × 16,996.80
  4. Step 4: Simplify right side
    19,329.60x = 491,710,625.28
  5. Step 5: Solve for x
    x = 491,710,625.28/19,329.60
  6. Step 6: Final answer
    x = 25,438.22

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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.