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Finding the Fourth Proportional to 12,687.80, 19,020.18 and 4,902.44

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Solution

The fourth proportional to 12,687.80, 19,020.18 and 4,902.44 is: 7,349.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,687.80 : 19,020.18 = 4,902.44 : x
  2. Step 2: Convert to fraction form
    12,687.80/19,020.18 = 4,902.44/x
  3. Step 3: Cross multiply
    12,687.80x = 19,020.18 × 4,902.44
  4. Step 4: Simplify right side
    12,687.80x = 93,245,291.24
  5. Step 5: Solve for x
    x = 93,245,291.24/12,687.80
  6. Step 6: Final answer
    x = 7,349.21

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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.