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Finding the Fourth Proportional to 19,240.20, 28,865.88 and 9,385.20

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Solution

The fourth proportional to 19,240.20, 28,865.88 and 9,385.20 is: 14,080.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,240.20 : 28,865.88 = 9,385.20 : x
  2. Step 2: Convert to fraction form
    19,240.20/28,865.88 = 9,385.20/x
  3. Step 3: Cross multiply
    19,240.20x = 28,865.88 × 9,385.20
  4. Step 4: Simplify right side
    19,240.20x = 270,912,056.98
  5. Step 5: Solve for x
    x = 270,912,056.98/19,240.20
  6. Step 6: Final answer
    x = 14,080.52

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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.