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Finding the Fourth Proportional to 18,724.25, 28,107.98 and 9,509.69

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Solution

The fourth proportional to 18,724.25, 28,107.98 and 9,509.69 is: 14,275.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,724.25 : 28,107.98 = 9,509.69 : x
  2. Step 2: Convert to fraction form
    18,724.25/28,107.98 = 9,509.69/x
  3. Step 3: Cross multiply
    18,724.25x = 28,107.98 × 9,509.69
  4. Step 4: Simplify right side
    18,724.25x = 267,298,176.33
  5. Step 5: Solve for x
    x = 267,298,176.33/18,724.25
  6. Step 6: Final answer
    x = 14,275.51

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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.