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Finding the Fourth Proportional to 18,800.64, 28,190.16 and 12,567.78

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Solution

The fourth proportional to 18,800.64, 28,190.16 and 12,567.78 is: 18,844.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,800.64 : 28,190.16 = 12,567.78 : x
  2. Step 2: Convert to fraction form
    18,800.64/28,190.16 = 12,567.78/x
  3. Step 3: Cross multiply
    18,800.64x = 28,190.16 × 12,567.78
  4. Step 4: Simplify right side
    18,800.64x = 354,287,729.04
  5. Step 5: Solve for x
    x = 354,287,729.04/18,800.64
  6. Step 6: Final answer
    x = 18,844.45

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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.