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Finding the Fourth Proportional to 18,693.64, 28,000.24 and 8,818.12

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Solution

The fourth proportional to 18,693.64, 28,000.24 and 8,818.12 is: 13,208.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,693.64 : 28,000.24 = 8,818.12 : x
  2. Step 2: Convert to fraction form
    18,693.64/28,000.24 = 8,818.12/x
  3. Step 3: Cross multiply
    18,693.64x = 28,000.24 × 8,818.12
  4. Step 4: Simplify right side
    18,693.64x = 246,909,476.35
  5. Step 5: Solve for x
    x = 246,909,476.35/18,693.64
  6. Step 6: Final answer
    x = 13,208.21

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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.