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Finding the Fourth Proportional to 19,209.88, 28,827.78 and 7,521.64

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Solution

The fourth proportional to 19,209.88, 28,827.78 and 7,521.64 is: 11,287.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,209.88 : 28,827.78 = 7,521.64 : x
  2. Step 2: Convert to fraction form
    19,209.88/28,827.78 = 7,521.64/x
  3. Step 3: Cross multiply
    19,209.88x = 28,827.78 × 7,521.64
  4. Step 4: Simplify right side
    19,209.88x = 216,832,183.16
  5. Step 5: Solve for x
    x = 216,832,183.16/19,209.88
  6. Step 6: Final answer
    x = 11,287.53

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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.