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Finding the Fourth Proportional to 19,275.80, 28,892.10 and 9,912.20

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Solution

The fourth proportional to 19,275.80, 28,892.10 and 9,912.20 is: 14,857.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,275.80 : 28,892.10 = 9,912.20 : x
  2. Step 2: Convert to fraction form
    19,275.80/28,892.10 = 9,912.20/x
  3. Step 3: Cross multiply
    19,275.80x = 28,892.10 × 9,912.20
  4. Step 4: Simplify right side
    19,275.80x = 286,384,273.62
  5. Step 5: Solve for x
    x = 286,384,273.62/19,275.80
  6. Step 6: Final answer
    x = 14,857.19

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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.