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Finding the Fourth Proportional to 19,251.60, 28,855.80 and 10,935.60

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Solution

The fourth proportional to 19,251.60, 28,855.80 and 10,935.60 is: 16,391.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,251.60 : 28,855.80 = 10,935.60 : x
  2. Step 2: Convert to fraction form
    19,251.60/28,855.80 = 10,935.60/x
  3. Step 3: Cross multiply
    19,251.60x = 28,855.80 × 10,935.60
  4. Step 4: Simplify right side
    19,251.60x = 315,555,486.48
  5. Step 5: Solve for x
    x = 315,555,486.48/19,251.60
  6. Step 6: Final answer
    x = 16,391.13

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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.