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Finding the Fourth Proportional to 18,669, 28,003.62 and 4,818.12

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Solution

The fourth proportional to 18,669, 28,003.62 and 4,818.12 is: 7,227.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,669 : 28,003.62 = 4,818.12 : x
  2. Step 2: Convert to fraction form
    18,669/28,003.62 = 4,818.12/x
  3. Step 3: Cross multiply
    18,669x = 28,003.62 × 4,818.12
  4. Step 4: Simplify right side
    18,669x = 134,924,801.59
  5. Step 5: Solve for x
    x = 134,924,801.59/18,669
  6. Step 6: Final answer
    x = 7,227.21

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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.