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Finding the Fourth Proportional to 18,844.79, 28,267.20 and 8,312.58

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Solution

The fourth proportional to 18,844.79, 28,267.20 and 8,312.58 is: 12,468.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,844.79 : 28,267.20 = 8,312.58 : x
  2. Step 2: Convert to fraction form
    18,844.79/28,267.20 = 8,312.58/x
  3. Step 3: Cross multiply
    18,844.79x = 28,267.20 × 8,312.58
  4. Step 4: Simplify right side
    18,844.79x = 234,973,361.38
  5. Step 5: Solve for x
    x = 234,973,361.38/18,844.79
  6. Step 6: Final answer
    x = 12,468.88

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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.