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Finding the Fourth Proportional to 19,326.60, 28,909.80 and 18,145.80

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Solution

The fourth proportional to 19,326.60, 28,909.80 and 18,145.80 is: 27,143.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,326.60 : 28,909.80 = 18,145.80 : x
  2. Step 2: Convert to fraction form
    19,326.60/28,909.80 = 18,145.80/x
  3. Step 3: Cross multiply
    19,326.60x = 28,909.80 × 18,145.80
  4. Step 4: Simplify right side
    19,326.60x = 524,591,448.84
  5. Step 5: Solve for x
    x = 524,591,448.84/19,326.60
  6. Step 6: Final answer
    x = 27,143.49

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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.