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Finding the Fourth Proportional to 12,787.68, 19,183.40 and 4,019.68

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Solution

The fourth proportional to 12,787.68, 19,183.40 and 4,019.68 is: 6,030.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,787.68 : 19,183.40 = 4,019.68 : x
  2. Step 2: Convert to fraction form
    12,787.68/19,183.40 = 4,019.68/x
  3. Step 3: Cross multiply
    12,787.68x = 19,183.40 × 4,019.68
  4. Step 4: Simplify right side
    12,787.68x = 77,111,129.31
  5. Step 5: Solve for x
    x = 77,111,129.31/12,787.68
  6. Step 6: Final answer
    x = 6,030.11

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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.