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Finding the Fourth Proportional to 18,885.94, 28,335.88 and 7,793.60

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Solution

The fourth proportional to 18,885.94, 28,335.88 and 7,793.60 is: 11,693.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,885.94 : 28,335.88 = 7,793.60 : x
  2. Step 2: Convert to fraction form
    18,885.94/28,335.88 = 7,793.60/x
  3. Step 3: Cross multiply
    18,885.94x = 28,335.88 × 7,793.60
  4. Step 4: Simplify right side
    18,885.94x = 220,838,514.37
  5. Step 5: Solve for x
    x = 220,838,514.37/18,885.94
  6. Step 6: Final answer
    x = 11,693.28

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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.