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Finding the Fourth Proportional to 18,886.95, 28,337.40 and 7,794.60

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Solution

The fourth proportional to 18,886.95, 28,337.40 and 7,794.60 is: 11,694.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,886.95 : 28,337.40 = 7,794.60 : x
  2. Step 2: Convert to fraction form
    18,886.95/28,337.40 = 7,794.60/x
  3. Step 3: Cross multiply
    18,886.95x = 28,337.40 × 7,794.60
  4. Step 4: Simplify right side
    18,886.95x = 220,878,698.04
  5. Step 5: Solve for x
    x = 220,878,698.04/18,886.95
  6. Step 6: Final answer
    x = 11,694.78

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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.