Home / 12,439.15-18,637.93-5,408.62

Finding the Fourth Proportional to 12,439.15, 18,637.93 and 5,408.62

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Solution

The fourth proportional to 12,439.15, 18,637.93 and 5,408.62 is: 8,103.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,439.15 : 18,637.93 = 5,408.62 : x
  2. Step 2: Convert to fraction form
    12,439.15/18,637.93 = 5,408.62/x
  3. Step 3: Cross multiply
    12,439.15x = 18,637.93 × 5,408.62
  4. Step 4: Simplify right side
    12,439.15x = 100,805,545.96
  5. Step 5: Solve for x
    x = 100,805,545.96/12,439.15
  6. Step 6: Final answer
    x = 8,103.89

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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.