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Finding the Fourth Proportional to 19,273.80, 28,910.70 and 9,419.40

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Solution

The fourth proportional to 19,273.80, 28,910.70 and 9,419.40 is: 14,129.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,273.80 : 28,910.70 = 9,419.40 : x
  2. Step 2: Convert to fraction form
    19,273.80/28,910.70 = 9,419.40/x
  3. Step 3: Cross multiply
    19,273.80x = 28,910.70 × 9,419.40
  4. Step 4: Simplify right side
    19,273.80x = 272,321,447.58
  5. Step 5: Solve for x
    x = 272,321,447.58/19,273.80
  6. Step 6: Final answer
    x = 14,129.10

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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.