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Finding the Fourth Proportional to 19,149.60, 28,747.80 and 10,835.40

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Solution

The fourth proportional to 19,149.60, 28,747.80 and 10,835.40 is: 16,266.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,149.60 : 28,747.80 = 10,835.40 : x
  2. Step 2: Convert to fraction form
    19,149.60/28,747.80 = 10,835.40/x
  3. Step 3: Cross multiply
    19,149.60x = 28,747.80 × 10,835.40
  4. Step 4: Simplify right side
    19,149.60x = 311,493,912.12
  5. Step 5: Solve for x
    x = 311,493,912.12/19,149.60
  6. Step 6: Final answer
    x = 16,266.34

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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.