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Finding the Fourth Proportional to 12,685.95, 19,032.09 and 4,788.45

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Solution

The fourth proportional to 12,685.95, 19,032.09 and 4,788.45 is: 7,183.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,685.95 : 19,032.09 = 4,788.45 : x
  2. Step 2: Convert to fraction form
    12,685.95/19,032.09 = 4,788.45/x
  3. Step 3: Cross multiply
    12,685.95x = 19,032.09 × 4,788.45
  4. Step 4: Simplify right side
    12,685.95x = 91,134,211.36
  5. Step 5: Solve for x
    x = 91,134,211.36/12,685.95
  6. Step 6: Final answer
    x = 7,183.87

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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.